C252 Slide tunnel

"Very well! "That's easy!" Your grandpa started to kick with all his might. After kicking for a while, he shook the bolt inside out, revealing the gap, and then used the sword to pry it open. Finally, he broke open the steel plate that was only a foot square.

That metal board was extremely thick and heavy. After moving it away, a dark hole was revealed.

The cave entrance was indeed very hidden