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The entrance to this cave was vertical, and after descending about two meters into the opening, you would reach the bottom. There was a smaller horizontal entrance to the side. Going through this entrance and walking about ten meters would bring you to He Tiantian's secret base.
This was not a sealed cave. The floor area was about two to three hundred square meters, and there was a section of about ten square meters through which you could see the sky; it was a very spacious cavern.
Because the top let in light, the inside wouldn't be dark as long as there was sunlight outside. Within the cave was a tree of strange growth that He Tiantian could not recognize. At the base of the tree, there was a spring bubbling out clear green water, which formed a small pool surrounded by a lot of vegetation, mostly wild vegetables known to He Tiantian.