The deepest free-fall pit in the lower 48 United States, the Fantastic Pit features a staggering 586 feet (179m) drop - a ...

One such drop is known as Fantastic Pit within Ellison’s Cave. It is the deepest freefall pit in America, plunging down vertically for 179 meters (586 feet). Within the same system is Incredible ...

and pits—some more than 100 meters (328 feet) deep—connected by narrow rift passages called meanders. The cave, located in the separatist region of Abkhazia, was named after Russian geologist ...