Cave Columns in the Caverns of Sonora

The Caverns of Sonora have numerous types of speleothems, or cave formations. In this image, stalactites can be seen hanging from the ceiling; stalagmites can be seen rising from the floor; and all along the walls are small formations known as "cave popcorn." The central focus of the image are several columns, which occur when stalactites and stalagmites fuse.