A Texas cave can be a cool place to escape the summer heat. Caverns dot the Hill Country where water seeping through to the Edwards Aquifer eroded the soft limestone rock that lies just beneath the surface. For an “armchair adventure”, check out this video tour of the Caverns of Sonora.
Side note: Sadly, this formation was vandalized in 2006 by an unknown cavern visitor. Thousands of years of delicate formation–wiped out by one thoughtless action. Whenever you tour Texas caves PLEASE do not touch the living walls!