When I last visited there were a lot of little caves, tunnels really, that weren't very big. Our Marine explorers were the runts of the litters. They explored quite a few of these "caves" but they weren't very eco-friendly. In some cases they tried to make them a little bigger by using explosives. This was quite to the dismay of the little people that inhabiteded them.:devil: Of course, that was in 1966-69. I guess a lot has changed since then but not enough for me to want to see their new caves.
I see they made them bigger this time. That would create a challenge trying to figure how much c-4 to seal it off and keep them forever in the dark.