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sinkhole
A Shakehole or Sinkhole.
The resulting surface depression is a shake-hole or simply, a collapse or depression, though specific ones occasionally find themselves given a proper-noun name. Underground the result of such structural failure is a mass of boulders blocking the passage, and known as a "boulder choke".
Sinkholes form typically as limestone dissolves. A caldera is created by the collapse of volcanic vault ceilings.
Caverns and sinkholes are both formed in limestone bedrock by the process of dissolution, where groundwater dissolves the rock. Sinkholes are formed when the roof of a cavern collapses, resulting in a depression on the surface. So, caverns can be an intermediate stage in the formation of sinkholes.
Carlsbad Cavern is named after the town of Carlsbad, New Mexico, about 26 miles to the northeast.
It was called "The Cavern Club".
There isn't a place called Lake Cavern, unless you meant the caverns in Lake Acuity, Lake Valor, and Lake Verity. Every lake has the cavern in the center of the lake and will have the trio inside in each when they have been released.
I am not at all sure what you mean by a "cavern zone", but you can only enter a cavern by an open, humanly-passable entrance on the land surface. +++ Ah! One mark to you! :-) I have re-visited my answer above because I have just looked down the page to see there's something called a "cavern zone" in some game or tother!
There are many caves in the Peak District, such as Peak Cavern (aka unofficially as The Devil's Arsehole), Blue John Cavern, Poole's Cavern, Speedwell Cavern. All are well worth visiting. Speedwell and Peak Caverns are in fact linked, but in a remote region beyond the show-cave limits.
I'll explore this cavern when I have a flashlight.
Crater: Hollow, Dip, Depression, Basin, Bowl, Cave, cavern, and hole are the synonyms Hump, Bulge, Bump, Lump, and Swelling are the antonyms