UNDERGROUND Comparison These are the DEEPEST un
Post# of 123338
(Total Views: 241)
Posted On: 02/16/2022 12:04:37 PM
UNDERGROUND Comparison
Quote:
These are the DEEPEST underground STRUCTURES, represented on a real scale, mines, caves, cities, tunnels, installations, etc.
Note: Depth is measured from the lowest point to the surface, not to sea level.
(0)
(0)
Scroll down for more posts ▼