Cave of Melody, Scotland...
A grotto is a small cave or a structure designed to resemble a cave. In both cases, the grotto is used by people for a variety of purposes. Natural caves which are not used by humans are generally just known as “caves.” Grottoes have been a source of interest for humans for centuries, and some very interesting archaeological finds have been made in grottoes all over the world.
I love caves
Un Cenote Lindo, Yucatan, Mexico A bather wades in clear blue waters in a cenote, or sinkhole, on the Yucatan Peninsula of Mexico. Cenotes form when the limestone ceiling of a cave collapses, revealing the void (and the groundwater) below. Some of these sinkholes look like large exposed lakes, while others, like this one, become underground cathedrals, with only a small hole in the ground allowing rays of light through. The water in cenotes is crystal-clear.
Fantastic Pit at Ellison's Cave, Georgia. Journey to the center of the earth.
Ruby Falls, Chattanooga, Tennessee
Devetashka cave, Bulgaria