I don't remember how I got down, but my brain was extremely congested and my mind was in turmoil until the fat man slapped me.

"Smack."

"Why did you hit me?"

"Why did you hit you? Do I want your orange syrup! The fat man gave me a disdainful look, "It's here, don't be a demon, if you're stupid, I'm not the only one who hit you." ”

I came to my senses and saw that the old man and Xu Ming were already next to me. "It's not too far from here, and the road after that isn't very steep, so there's nothing in the way." Xu Ming said to us at this time, "Need to go down again?" ”

"Don't." I immediately stopped his move, I can't breathe anymore, this situation is simply better to kill me, I'm not afraid of heights, it's completely the most primitive manifestation of insecurity.

After resting for a while, we slowly descended again, this time it was Xu Ming who took me, I have to say that his technique is still quite clever, anyway, at least I won't get dizzy. After a while we reached the bottom, the terrain below was no longer a bumpy road, nor a vertical tunnel, but just a winding path between the rock walls that only allowed one person to pass. "What's going on? It's actually a small crack? I asked.

Walking between the dim and damp narrow stone walls, just touching the stone walls one foot deep and one foot shallow. "No, this is a mountain, how can it be that there is only such a small space that we saw on it before?" The old man said that after a while, he walked the path unexpectedly and came to a stone chamber with a relatively wide space, and the stone chamber was erected with mountains and stones, and the slope was vertical and horizontal. It's just that there is a large undulating slope in the gap between the stone wall on the opposite side, and as you walk through here, the field of vision reaches a surprising height as the light of the flashlight reaches the end.

Then the sound of water slowly reached our ears, "Water again?" It can't be the sea down there, right? I said.

"No, it won't." This is the sound of the river, I think it should be the water in the pool, sure enough, a river appeared in front of us not long in front of us, I looked at our river road, the left and right were very smooth, it looked like an underground waterway on the street, the fat man scolded that I didn't see a turtle like anything can be associated with a sewer. The top of the river is the top of the mountain, I was scolded back by the fat man's fire, suddenly a gust of wind blew, my neck was cold, naturally raised my head to look, the top of the river is a round table size hollow, the left and right sides of the hole are covered with unknown grass and trees, on the top of a point is a huge stalactite, the light reflecting the flashlight looks like an upside down person "ground" roaring.

Sure enough, this place is a sewer structure, I thought to myself, and then I saw the old man make a gesture to Wang Lei and saw him climb up.

"How?" The old man asked, "What's on it?" ”

"What do you call him?" Before the old man could come to his senses, the fat man dragged me up, and the water below was so icy that it was like walking barefoot in the snow, and I even wondered if my shoes were frozen now.

Standing on it, I was able to see the whole picture of the whole underground world, the wind was whistling, and the air flow was played into a strange music when it flowed through the stalactites overhead, except for the extra-large stalactite, at the top of the cave near us in other places, those stones were like upside-down swords hanging in the air, and the mountains were almost all yellow, not the colorful in the landscape cave, but the black and yellow-brown of death. The surface of the rocks on the mountain wall is pitted like a small staircase, and the water stains on it flow down the "stairs" step by step.

The old man and the fat man climbed up one after another, and after we rested for a while, we began to walk from above to the end of the darkness, and on the way I asked the old man, "I have walked for so long, and I have not seen anything, and I am wondering if the mask is a person?" Or is it something? ”

The old man said, "It can't be wrong, don't you think it's too weird if it's a human?" Staying in one place for half a day just to guard someone? Or when that person is on the way back, you go to pull someone into the water, and what's even more fun is that you are pulled into the water and then someone breaks free, and you don't chase after it, let others run away, do you think this is something done by one person? ”

I shook my head. It's not so much that we don't know where to go, we've been deep for so long now, and the initial expectation has long since slowly dissipated, maybe as the old man said, that thing is indeed something in this underground space, but how should I find it? Another point of conflict is that the madman and the third uncle I met in Jianhe before said that my mask came from the desert Gobi, that is, the ghost country.

We started walking from the section of the river, and in less than 10 minutes we joined the river again, and here was already a different scene, with green stones lying quietly on both sides of the river, and the side walls were densely inlaid with many small pebbles, all kinds of different colors, some of which were rendered a layer of pale green between the stones for some reason.

Compared to the stones on both sides of the river, the center of the river was much larger, it was a stone extending from the top of the cave, and he just placed it horizontally in the water, dividing the water into two streams, because his area was so large that a lot of sediment was blocked in the middle, and around him were some coral-like stones that had been immersed in the water.

"There shouldn't have been any water passing through here before!" The old man said, "Nature is really. ”

"I know he's running out of words.

When the fat man saw that the old man was poor, he wanted to laugh, but when he saw that the old man's expression was wrong, he immediately answered him: "Awesome! ”

"Ahh Yes, yes, yes! The old man laughed, "Nature is amazing. ”

"Hey," Xu Ming and I sighed at each other.

The rest of the road is a little difficult to walk, the road next to the river is getting narrower and narrower, and it is full of water, because it is close to the mountain, there are many cracks in the mountain, and the wind in these cracks is very strong, and I don't know where it leads, but there is a constant flow of water in it, several times I have slipped and fallen, I touched the water and the water is as cool as snow water, these water flows are rainwater When the rainwater flows along the cracks in the ground, it continues to widen and deepen the cracks, until finally a cave system or underground river channel is formed. I know that in a few hundred years there will be an underground river here, and my distance is nothing, less than 10 meters in front of is a stepped stone platform, the water falls from above, making a crisp sound, the stone platform is interrupted, the stone bones are craggy, the rock is exposed, the old man He said that we have to tie a rope to it before we can hang down.

I glanced down and my head immediately dizzy.

Stepping on the water, the water surrounded my feet through the shoes, and suddenly my heels were soft and almost fell, fortunately Wang Lei next to me helped me, I took his hand, looked down, the water impact on the raised rocks splashed white flower mist, it was coincidental that a ray of light shot down, refracted into the water vapor with a colorful circle of light, I saw a little distracted Wang Lei pulled me back with a force, I saw that the old man was already preparing to go down, There are a few large stones in the middle of the water below, the stones are washed by the water smooth as a mirror, but it is easier to walk with shoe covers, because he does not know the depth of the water, he is a little cautious after going down, no one can save you in this place, even if you are saved, I don't know whether to save or find death.

Is this really the place I've been looking for? Before I knew it, this question was haunting my ears again. Looking up, in the distance of me, in the depths of darkness, I saw something like a mist swirling in the sky. There seems to be another world there.

This stone staircase is not comparable to the vertical underground cave before, except for the huge flow of water, it is this unique terrain, according to the old man, we can only tie a rope to the rock above the stone steps of the waterfall and walk down the stone wall a little by little through the protruding section of the stone wall.

I was the penultimate to go down, and the first old man had reached the bottom without danger, and below was a flat open field, which I could see from the searchlight that had been fixed to the ground.

I jumped down from the first stone platform in fear, the water whistling down my side, the loud sound made me shudder, I gasped for breath, and then walked down a small circle of rocks, at the end of which the old man had already marked my direction with a searchlight, and I was going to jump over a small platform and jump to another platform in one breath.

The continuous flow of water and the icy air had formed a thin layer of ice on that platform, and I couldn't help but look at it, knowing that even if you had a rope in this place, if you made the slightest mistake, you would be hanging upside down under the waterfall and being killed by the direct impact of the current. Faced with death so many times, I didn't even think I would be afraid of anything on the other side, but I couldn't help but tremble when I saw Bo Ice's legs on the other side.

"It's the first time." I said to myself, "It's the first time I've been so eager to catch up with death." ”

There's no time for me to hesitate, there is Xu Ming behind me. Suddenly, I jumped out. Not surprisingly, my whole center of gravity fell out because the foothold was too slippery. It's over. My eyes went dark, I felt something in my face, and finally the shaking of the rope and the exclamation of the old man below.

But fortunately, my rope swayed in mid-air and the previous gravity and acceleration, I was washed to another rock exposed outside the water, and for the rest of my life, I immediately opened my eyes and hugged the stone, and then I saw Xu Ming jump down from it and asked me how was the situation?

I smiled and got up to tell him it was okay, then took a break and continued to jump down. It didn't take long for us all to descend to the surface, and now in front of us was the beginning of the whole picture of this underground space.

We had been walking for half an hour in this vast underground system, and I realized how far away the sight we had seen before, and after descending this staircase, we could finally reach a relatively flat area, and the water flow fell into a cavern at our feet, and there was nothing to see in it, only the continuous sound of the water rushing.

Since we descended to such a low position, our vision is not wide, the smoke clouds in the high sky still cover most of the space, and the front is also dark, and even the road section cannot be seen clearly.

"Be careful, the section of the road here is still expanding to two pieces, the area of this cave is surprisingly large, I don't know if it was built by man?" The old man's tone was a little softened, maybe he was worried about something!

"If that's the case, then we're a bit of a stretch." Xu Ming stepped over a rocky block on the ground and walked towards the two sides of the cave, "The stones on the walls are very wet, a little edge-edged, but they are not the kind of traces that have been excavated by human tools. ”

I nodded, so clear. This place is a natural cave. But as soon as I figured it out, I found that the old man was gone, and when I looked around, I saw the old man squatting on the edge of the deep pool and personally installing the battery for the flashlight, and we scattered around to observe the terrain, the rock wall of the mountain has a lot of jagged convex stones, and the middle part of these stones has a very obvious fault, I am a little curious, what is in those faults? He took the flashlight from the fat man, and the light shone on the dark mid-air, and the crack was completely revealed.

Because the area of this rock wall is very large, there is no interval in the middle, so it extends infinitely to both sides, I can't see the end of it in the dark, stretching away, what a majestic spectacle, all kinds of stones sticking out of the mountain wall form a natural strange picture, some like clouds, some like dragons. As my gaze moved upward, I slowly found the horizontal stone wall that cracked in the middle, and inside was the space where the light could not reach, and the intersection of light and shadow formed a huge thing standing there. I know that the cracks in the rock wall are caused by physical factors such as fractures and collapses of the mountain, but these reasons are not enough to make the rock wall completely collapse, forming such an underground wonder, but what is that huge thing?

"What like the carcass of an animal?" The fat man came over and said.

"Really?" I didn't turn my head to look at him, I just focused my attention more, why are there corpses here? And so big.

"It's indeed a corpse, your eyes are not good, but I can see clearly, but I don't read much, I don't know."

At this time, the old man also came over, glanced at the huge dark gap, and said, "That is the carcass of a kind of arowana in the sea." He talked.

Arowana? Marine animals? Suddenly I understood that this place may have been an underground sea hundreds of millions of years ago, and the Arowana was stranded in that place, that is to say, the crack was the water level at that time, and the place where we are now is the water area of the past. Over millions of years, countless marine creatures have died, and their bones have been deposited on the ocean floor and hardened into rock. Over time, the sedimentary rocks have accumulated thicker and thicker, and the thickness can be similar to that of the Himalayas.

"The structure of this place should be a sinkhole, and it is bigger than we thought." The old man said again, "The walls are very wet, and some of the stones are even a little smooth, which must be formed by the signs of water flowing down from above. I've read in books about the rainwater seeping into the ground along the rock crevices to form underground rivers. When rainwater flows into the rock crevices, it will gradually dissolve the rocks, widen the rock crevices to form natural underground corridors and vertical pits, called Ou holes. After thousands of years, the rock peels off, expands and deepens into a cave, called a cave. ”

"Above us is a sinkhole, through which the water of the river flows underground, and slowly creates this cave over time." Xu Ming said, but there is one thing I think differently from you, Master, he smiled and said, "The water that flows down from the sinkhole does not flow directly from these walls, because so much water and such a long descent cannot create such a smooth surface, and it seems to me now that there is only fine water accumulated and flowing from the stones on this wall, so the real mainstream must not be here, or even has died, think about it, it can dissolve the water of such a large underground corridor and pit, How much impact and flow can there be, it must be like the legendary South China Sea Ruins. I guess the water on the wall came out of the edge of the sinkhole when it was rising, or it could have seeped in through the cracks in the bare rocks on the surface during a rainstorm. ”

"Then do you mean that the front of this cave is not a normal sinkhole structure?" The old man frowned.

"No, quite the opposite." Xu Mingdao "The flow is different, this can actually be seen at a glance." "I followed the direction of his finger and saw several streams of water coming out of the underground lake on the ground to form a small stream of water flowing in front of us, and for a moment I understood that it was a problem of terrain, and if this hole was a sinkhole, then this terrain would never exist.

Stepping on the water we continue to walk forward, the darkness is the most devastating, at the beginning I also had time and no time with the fat man to get involved in the two, about the topic of international surnames, but slowly none of us have a conversation, the dull anger is invisible, I said in my heart that this is not good, the most afraid of this in the dark is this, such an atmosphere will bring unprecedented pressure, I was thinking about how to mediate the mood of the crowd, over there I saw the old man in front stopped.

"What's wrong?"

No one spoke, and an invisible fear crept in the darkness.

"Hey, hey?" I pushed the fat man away and looked ahead, only to see a white object in a flowing water downhill in front of us, which was constantly moving forward.

;