Well this is fairly mind boggling, especially if you lived next door, but I don't think it's controversial.
{ edit } the below link now points to a different picture,
www.newscientist.com/gallery/dn15018-pick-of-the-pictures/
so here it is
Isn't this just a typical Guatemalan public toilet. 100ft deep long drop, just be careful not to fall in.
Seriously though, amazing wha mother nature dishes up.
I wondered about that, presumably there's an underground river at the bottom of it, that caused the problem in the first place.
If you block the flow, the problem will move somewhere else. May be a big pipe or something at the bottom to allow water flow, then seal over that with concrete, and back fill with anything you want to get rid of, as long as it can be compacted.
