At this moment, he can't care so much, he can only take one step at a time, he and Xu Xiake take the lead, and lead them into the underground cave one after another, entering the tunnel at the end of the underground cave.

I have to say that this tunnel is completely different from the previous tomb tunnels or cave tunnels. No matter how rugged and steep they are, they are dry and easy to walk, the tunnel under the current water has been sunk underwater for thousands of years, and the stones have long been soaked in water, even through the waterproof clothing, you can feel the cold in the tunnel, and continue to penetrate into the pores through the waterproof clothing, as if touching the popsicle through the skin, there is a kind of cold that is isolated, look carefully, the surface of the tunnel has been washed by the water very smooth, like a pebble slippery and shiny, if there are gaps or bumpy rough places, it must be overgrown with moss and algae, countless spots and patches scattered throughout the tunnel, It's like the streamers and silk here, swaying slightly under the action of the current.

The only advantage is that the lake water in the tunnel is quite clear, and after all the searchlights above everyone's heads are turned on, they can directly see everything around them in the tunnel, and the water flow is like transparent air, leaving bright and flickering light patterns on the stone wall.

Song Siyuan swam to Yue Guanchao's side and motioned for him to look at his feet. He looked behind him by the searchlight, and after they had sneaked some distance, it was easy to see that the bottom of the tunnel seemed to be slowly leaning upwards.

"Uh-huh, going up?" After Yue Guanchao finished whining, Song Siyuan nodded and whined: "It seems to be a tunnel that slopes upwards." Their suspicions were soon confirmed, and as they continued to dive up, they could easily feel the resistance of the water increasing, and when they looked back, the hole illuminated by the diving bell had turned into white spots, and the horizon was indeed slowly sloping upwards, as if it were a slide, and they could slide all the way down.

It's just that the slope is so small that they can't feel it. After walking for a few hundred meters, the slope became steeper and steeper, and it became more and more difficult for them to sneak upward, but the situation was already beginning to change, Song Siyuan motioned for them to look at their feet, and the stairs that should have been smooth appeared on the stone slabs, which continued to extend forward, and even the width of the cave was also widening, from two or three meters wide to seven or eight meters wide.

They knew that the entrance to the tunnel was probably ahead, and that it was much easier for them to walk on the stairs with all their might, by the buoyancy of the water, as if they were walking on a quilt and walking up the stairs.

At the end, the square tunnel in front of him had turned into a circular pool, and there were obviously leaves floating on the surface of the water.

The fact that the leaves can float on the surface of the water means that the tunnel is no longer flooded to the top, leaving gaps that allow air to enter, and at the same time, it can also indicate that animals and plants can live here.

Under all kinds of surprises, Yue Guanchao swam above the surface of the water, and with a loud noise, he really saw that the grotto above his head was still five or six meters high, and under the illumination of the searchlight, it was easy to see that the gap in the distance was getting bigger and bigger, and they had come to the huge pool at the end of the tunnel.

Everyone surfaced with Yue Guan Chao and walked through the last flight of stairs to land. Looking around, it was a circular dome stone cave, bounded in the middle, half of which was a sunken pool and half a stone platform, and it was from the sunken pool that they walked up to the stone platform.

"How can there be such a place in the world, we obviously came up from underwater, why is there no water here?" Luo Shi Niang was very curious, she thought that the entire treasure ship had been sunk into the water, and now, the cave was dry and dusty, and even surrounded by weeds and low trees at the water's edge, which really puzzled her.

"There are no surprises in the world, and the fact that we can enter here from a depth of forty meters is somewhat of a strange experience." After Yue Qingshan finished speaking, Song Siyuan explained: "This Heroic Soul Tomb is actually a reference to the nests of some animals, which uses the principle of nesting to form today's wonders. Seeing that everyone's eyes were converging, she continued to explain the principle: "There is an animal called the otter in North America, this animal gives priority to the water's edge when building its nest, they will first dig a pit at the water's edge, and then dig a sloping waterway, which is directly connected to the water source, and then use dead branches and dry rattan mixed mud to surround the nest pit, and when these things are completely dried and solidified, and then cover with several layers of dead grass and vines, it will become a strong and durable nest." "This nest has many advantages, it is built near a water source to facilitate access to fresh water, it is also durable and sturdy, and the biggest advantage is that it is safe and concealed.

As mentioned earlier, this kind of nest pit has a waterway, this kind of waterway is inclined downwards like the one in front of you, because the water level in the hole is also level with the water surface, the more you go up the hole, the more you can stay away from the water source, when the waterway is above the water surface, it will also come to the nest pit from the waterway.

The otter moves clumsily, and is not good at defending against the enemy, this waterway is located underwater, it can be said to be extremely hidden, not only to dredge the water source, but also to hide the nest, although the soul mound is not for safety, there is a purpose that does communicate with the otter nest, that is, concealment.

Only by putting the entrance of the Heroic Soul Tomb into the lake can people really find it, find it unfounded, if it is not for someone to understand the mystery in it, it may not be possible to find it for thousands of years.

Song Siyuan paused and looked at everyone: "The Southern Song Dynasty Yijun can come up with such an idea, it can be seen that there are masters to guide them, if you want to use waterproof materials, no one dares to say that they can persist for thousands of years, and they can build underwater caves in this state, which can take into account the waterproofing of the Heroic Soul Tomb, and it is also hidden enough, which can be said to kill two birds with one stone." ”

"This is just taking advantage of the magic of nature, and I am more curious about how these people sent the Southern Song Dynasty treasure ship here." After speaking, everyone took off their wetsuits, received them all in their backpacks, and walked forward with flashlights.

At the end of the stone platform, there is also a wider door, deliberately carved in the shape of a trapezoid, dark and chaotic.

After entering the pitch-black door hole, as everyone looked around, it can be seen that the left and right walls are about six meters high, and the top is specially made into an arch, and the fang beam completely supports the top stone wall, and every once in a while, there are beams to support the top of the tunnel.

On the stone wall separated by wooden beams, it is the mural painting of the Southern Song Dynasty righteous army against the enemy soldiers of the Jin State. Look carefully, the content of these murals is quite detailed and vivid, before the country broke most of the peaceful years, the country and the people, after the country broke it was like a purgatory on earth, and it was very special to draw a comparison picture on the stone walls on the left and right sides.

For example, the streets before the collapse of the country must be brilliant and lively, after the destruction of the country, the streets are full of beggars and displaced people, and even piles of corpses, golden soldiers wielding knives to kill, and there are thieves and thieves crossing the border, plundering and killing, a scene of the end coming.

For another example, the family picture before the country was broken must be a man ploughing and a woman weaving, children and grandchildren around the knees, and family harmony, but after the country was broken, many of the relatives and elders in the family died, and the young teeth were mostly boiled in the pot, and the husband and wife were sad and difficult to make a living, and the golden soldiers knocked on the door outside.