there is a depression in the center of the whole mask.

the scope of the depression is not large. It may only be half the size of a football field, and the depth is only ten meters.

but there is a strange building in this place.

is similar to the enlarged version of meat grinder.

at the top of a square house, there is a dark entrance, with a pipe connected to the side, and the pipe is connected to something like a big horn.

the position of the big horn just extends out of the depression more than ten meters high.

except for this strange building.

there are dozens...