liar
lair
cave
A sinkhole.
Liar A place inhabited by a wild animal, often a cave or a hole in the ground. Cave A hollow or natural passage under or into the earth, especially one with an opening to the surface.
It is a sink hole if it reaches the surface.
Misery Hole, called to the guano miners in 1914, the former name of the cave itself. Its cave is located in Carlsbad Caverns National Park, New Mexico. It is the deepest cave in the United States.
It could be called a cave, cavern, grotto, pot hole depending upon the size, how far into the cliff side it travels, if its all on ground level or if it goes underground etc.
ITs at the bottom of island six in a place called dotted hole
Collapsed caves are often referred to as sinkholes. This occurs when the roof of a cave collapses, creating a depression or hole on the surface. Sinkholes can pose dangers to infrastructure and properties located above them.
A tiger's home is called a lair or a den. It can be a cave, a hole in the ground, or any place where the tiger feels safe.
I would call it a cave in.
By Area Valley of Repose: Emergence Cave Subterranean Complex Frontier Cavern Awakening Wood: Hole of Beasts White Flower Garden Bulblax Kingdom Snagret Hole Perplexing Pool: Citadel of Spiders Gluttons Kitchen Shower Room Submerged Castle Wistful Wild: Cavern of Chaos Hole of Heroes Dream Den