Underground lake, Chapat Cave By Matt Young December 19, 2011 12:00 MST Photograph by James Rice. Photography contest, Honorable Mention Underground lake, Chapat Cave, Belize. This lake is the home of cave-adapted fish, crabs, and other life. Scientists are interested in the hydrology of Chapat Cave, since it is known to flood as much as a hundred feet above the normal level shown here. The timing and cause of the floods is not yet known.