The first room that Lin Mu arrived in was not the entry hallway, as he hadn't exactly entered from there.
'Though if it's this far deep in the ground, does it really matter where its entryway is?' Lin Mu thought and looked around.
He was standing in what looked like a side room and coming out from it, he found himself in a hallway that extended for quite some distance.
"It's surprising it has managed to maintain its form all this time." Lin Mu said as he looked at the walls and the weight bearing pillars.
There was certainly damage spread in the building, but it was still standing. He found many halls and rooms to have collapsed walls, but the load-bearing pillars still managed to hold up the ceiling. Even if the Gravity here was just 10, it was still higher than what a normal building would be able to bear.
And even if one took away the gravity, just the sheer amount of weight that was on top of it should have long since flattened it into a plate.
