Chapter 40: The Labyrinth of the Sea

Six thousand meters deep in the Mariana Trench in the Pacific Ocean, I took a small warship to the mouth of the cave I found last time, at this time the submarine cave is being transformed into an undersea city, the original hole has been replaced by several thick metal doors, the battleship slowly entered, and after docking with an active passage, I walked in, after ten minutes of walking, passing through one level after another, I came to a hall, which can already breathe freely.

"Ping'er, tell me about the hall." I said.

"Okay, big brother, the entrance to the cave is a buffer layer, which is divided into three layers, the first layer is one hundred meters high, and the second and third layers are fifty meters high each, so that different types of spaceships can enter and exit, and now the water in the entire cave has been basically emptied. The second hall is isolated from the first, divided into five floors, the ground floor is one hundred meters high, the remaining four floors are twenty-five each, the ground floor is designed as a square, a small park, the remaining four floors are preparation areas, each floor is equipped with simple living facilities, now the location of the eldest brother has been completed, and the other floors are still under construction. Now please change into a spacesuit and enter the passage. ”

The passage has not yet started construction, but the basic lighting has been installed, it looks good, a few minutes later I came to the largest submarine karst cave I found, the terrain here is slightly higher than the outside two meters, the bottom is pitted, there is a thick layer of sediment, I drove the car to the center of the cave, look around the situation, there are more than a dozen small caves around this cave, all are lit up, the top of the cave is illuminated by the lights around it, there are a lot of shiny things, I went up to see, it turned out to be a mineral crystal like snow, It is reflecting the light.

Directly opposite the cave hall is 200 meters away from the bottom, there are two holes that discharge a large amount of water, forming two large waterfalls that are 30 meters wide and 200 meters high, and there is a deep pool at the bottom of the waterfall, splashing a large splash.

"Ping'er, have you analyzed the reason?"

"After analysis, this water is fresh water, the quality is good, after the seawater in the cave is emptied, it will naturally form a waterfall, and this fresh water should be discharged from the underground river."

I also went around the caves, ranging in area from thousands of square meters to tens of thousands of square meters, and when I was studying what kind of mineral crystals were in the cave neck, I only heard a roar, and I hurriedly flew over.

"Ping'er, what's going on?"

"Big brother, there was a collapse at the entrance of the two caves that flowed fresh water, and now it has stopped, there is no danger."

I drove into one of the holes and found that the fresh water outlet used to be only about 10 square meters, but now it has become several hundred square meters, and the water volume is much larger, and the situation is similar to the fresh water outlet next to it.

"Ping'er, is this an earthquake-prone area?" I asked.

"No, the landslide accident just now may have been caused by uneven internal and external pressure after the seawater in the cave was evacuated."

"Ping'er, how many detection robots are there in the cave?"

"There are twenty-five of them."

"Okay, order them to enter the two holes, probe the inside, and report anything unusual."

After a while, I entered with four guards following the detection robot in front of me. The entrance of this cave is 30 meters high, 100 meters long, and there is a river in the middle, the river is more than 5 meters wide and 1 meter deep. After flying 5,000 meters, we entered a hall of about 20,000 square meters, and there were two small halls with an area of about 2,000 square meters, with a height of 10 meters, like a big ring with two small earrings.

The passage in front of us is forked, we enter the fork on the right, because there is a detection robot in front of the road, we are not slow, after entering a small hall, we found that the height of the small hall is 100 meters, there are two small waterfalls at 80 meters from the ground, and there are three holes at a height of 50 meters and 10 meters long and 5 meters high, so I had to wait for the detection information in place.

Half a day has passed, there are more and more forks in the road ahead, and the number of detection robots is not enough, so I asked the master brain to send another 1,000 detection robots in. A few hours later, we passed through a passage overgrown with stalactites and finally came to a huge cave, and after a short rest, began to sort out the information gathered.

The cave is 60 kilometers long, 50 kilometers wide, 200 meters high, and covers an area of more than 3,000 square kilometers, which is half the size of Shanghai. I was stunned after calculating, this is a real underwater city!

"Ping'er, what are the results of other directions?"

"Big brother, no such large karst caves have been found in other directions, but there are twelve karst caves with an area of 1,200 square kilometers, and eight of them are connected to each other, and the exploration work is still ongoing."

"Ping'er, how many meters is I from the sea here?"

"About four thousand meters, and there is a difference of two kilometers from the entrance."

As the exploration deepened, the three-dimensional image of this karst cave was displayed in front of me, there was a lake in the west of the center of the cave, 3,500 meters long, 3,000 meters wide, 20 meters deep, and there were three small islands in the middle, and there was no living life in the lake. The source of the lake is a river 20 kilometers long, the river is 80 meters wide, the water depth is 8 meters, and at the end are two waterfalls with a height of more than 100 meters, and the source of the waterfall has not yet been explored.

I didn't continue the exploration of the journey, back to the flagship to rest, the next day, Ping'er presented the seabed exploration information in front of my eyes, the whole pattern is like a tree, the first to find is a tree trunk, two branches, each fork and many small forks, those large and small halls are like fruit on the tree, there are hundreds, the farthest part of the fork is only more than 100 kilometers away from the Philippines, and one is even less than 50 kilometers away from the Ryukyu Islands. One thousand meters at the top of the cave, there is a petroleum gas field, close to the direction of Japan, and a large and three small petroleum gas fields were found in the direction of the Philippines, with a total reserve of 30 billion tons, and there is a thick layer of cobalt crust on the seabed directly above the entire cave, with an estimated reserve of 100 million tons.

After reading the materials, I sat down and thought about it・・・・・・