The underground space is very large. It was probably a city with a very developed modern civilization before, but it was attacked and destroyed by a giant creature. It is difficult to say whether it is the earth or not.

Luo Kai pondered for a moment and continued to explore. In the outermost area, there were some traces of excavation and exploration, and many small holes were punched out in the surrounding rock walls, which were divided into small stone chambers. Some animals were also found in the stone chambers. fur and bones, not complete

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