Ling Lingqi hurriedly ran out to take a look, and when he saw Qiu Susu's eager expression, he asked, "Susu, what's wrong?"

Qiu Susu said: "Come with me, there seems to be a secret passage here!"

Ling Lingqi was also shocked, he had lived for a few years, but he had not been able to find a way out, and suddenly Qiu Susu told him that he had discovered the secret way, how could he not be happy.

When the two came to the Fengyun Cave, Qiu Susu pulled Ling Lingqi to a stone wall, picked up a stone and knocked on it, only to hear a faint echo coming from inside. Ling Lingqi was also happy in his heart, the inside of this stone wall was empty! It seems that there is still a lot of things behind here, maybe this is the way to go out, not necessarily.

Ling Lingqi said in surprise, "Susu, how did you find out?"

Qiu Susu smiled: "Today I suddenly heard the sound of water drops in here, but when I came to see that there was no water dripping, and then I found that the sound of dripping water was behind this stone wall, so I knocked it with a stone and found that it was empty, I thought that there might be a passage behind this?"

Ling Lingqi nodded and said, "Su Su, your discovery is really good, maybe we can leave here today." I think there may be an underground cave behind it, and it is not possible to go straight to the top of the mountain. Otherwise, how did the people who died in it, and the people who built this cave, come down?"

Qiu Susu was puzzled: "What is a cave?"

Ling Lingqi said with a smile: "The underground space formed by a certain action in the rocks that can be dissolved by water is called a karst cave. Under the erosion of underground flowing water, the water infiltrates through the cracks in the rock layer and continuously dissolves, expanding the space of the cracks to form strange caves. If it is a vertical or steeply inclined fissure type cave, the caves formed by this kind of seepage water are isolated from each other at the beginning, and with the continuous expansion of the cave body, the water flow continues to concentrate, and the isolated caves continue to merge and communicate, forming an underground passage with a large cross-section, which is called an underground river. Maybe there's an underground river behind it, so there's the sound of water droplets. ”

Qiu Susu said excitedly: "Then let's smash this place open." ”

Ling Lingqi nodded, lifted a bucket-sized stone from the ground, and slammed it towards the stone wall with internal force!

Bang!

After a loud bang, the boulder pierced through the stone wall and landed on the other side of the stone wall, but it was heard with a bang...... Bang...... The sound was endless, and the stones kept rolling away. Behind this stone wall, there is indeed a cave!

Without time to think about it, Ling Lingqi hurriedly picked up another big stone and threw it at the stone wall again, after a few clicks, a hole in the stone wall was broken that could accommodate him, and then smashed the edge of the hole in the stone wall smoother, lit a torch, and took Qiu Susu into it.

This cave seems to be not small, and the light of the torch is not far away, and there is no end in sight, and now the two of them also feel that it is particularly cold here, and it seems that breathing has become a little difficult, Qiu Susu was so frightened that she hid in Ling Lingqi's arms.

Ling Lingqi knew that the most important thing now was to find a way out of this cave, it seemed impossible to climb up from the place where he fell, and this cave might be the only way out.

Ling Lingqi whispered: "Su Su, listen, there is the sound of flowing water in this cave! As long as we follow the direction of flowing water, we may be able to find the exit! And this cave does not seem to be simple, maybe there is no scenery in it! You follow me, be careful not to fall." ”

The two supported each other, walking in the direction of the flowing water in the cave, Ling Lingqi illuminated the cave with a torch, although he could not see the whole picture of the cave, but the top of the cave was seven or eight meters, and the width was ten meters, and at the same time, there were a lot of stalactites, which showed that this is a huge underground cave, and I don't know how long it is in front, so it should be possible for such a cave to lead to somewhere on the top of the mountain.

Because Ling Lingqi went to Zhangjiajie in his previous life, there is a dragon king cave, which also belongs to the typical karst terrain, the formation time is hundreds of millions of years, there are halls and platforms in the dragon king cave, stone corridors, pearl waterfalls, underground Yin River, lakes, water splash ponds, stalagmites, stone stalactites, stone pillars, stone curtains, stone flowers are all over it, there is a pool of about 400 square meters of dragon king pond in the lower right of the cave entrance, the pool is surrounded by steep stone walls, and the water depth of the pool is bottomless. Longwang Pond keeps the water level unchanged all year round, the fog in the pond is hazy in the morning and evening, and sometimes you can faintly see the swimming fish swimming, the wild duck playing in the water, the white pigeon rising and falling, which makes people feel like a dream.

Ling Lingqi thought to himself, this cave may not be much worse than the Dragon King Cave, today he is going to explore the scenery of the cave, and most importantly, this cave is their only way out!

After walking not far, the cave became bigger and bigger, from the ground to the top of the cave, it was more than twenty meters high, and the width reached thirty or forty meters, of course, Ling Lingqi also felt as if they were going up, so that's right!

After walking hundreds of zhang away, he didn't encounter any danger, Qiu Susu couldn't help but be bold, and by the light of the torch, he looked around curiously.

Not to mention, in the trickle under her feet, Qiu Susu suddenly touched a soft little thing, like a slippery little fish, she hurriedly said coquettishly: "Seventh brother, come and see, what is this?"

Ling Lingqi and Qiu Susu both looked at it, and saw a strange creature on Qiu Susu's palm, with a chubby head and a long tail, resembling a tadpole, but the whole body was transparent, and various organs and a white spine could be clearly seen.

Ling Lingqi was also the first time to see this kind of transparent creature, it didn't look like a fish, it should be the larva of some kind of frog, but such a creature obviously lived in the underground dark river for many years, so it would have a transparent body.

Ling Lingqi shone a torch into the water, and sure enough, there were such things everywhere in the water, Qiu Susu said in surprise: "Ah, this thing looks like a tadpole, but it is very different from ordinary tadpoles! Could it be an unknown animal?"

Ling Lingqi nodded and said, "It seems that the water in this underground cave is alive, which means that there must be an exit, let's go, let's continue to move forward and see if there are any other good things." ”

After walking for about a hundred meters, Qiu Susu suddenly exclaimed: "Ah, look at that stone wall, it's so beautiful!"

Qiu Susu just took advantage of the light of the torch in Ling Lingqi's hand to see some dark red stalactites on the stone wall, which were completely different from ordinary stalactites.

Ling Lingqi also looked in the direction Qiu Susu pointed, and when the flashlight shone there, he saw a strangely shaped red stalactite, distributed on a cave wall. That cave wall is not ordinary limestone either, but a piece of red sandstone, which is an absolute spectacle!

Ling Lingqi still remembered that in his previous life, he had also seen stalactites in the cave, but it was really rare for red sandstone to appear in this kind of limestone cave.

And the stalactites in this cave are not only several times larger than the ones he has ever seen, but also have a peculiar shape, which can be described as a miracle!