Travelers look beyond the usual summer spots that are cooler than the beach, with underground attractions and cavern escapes to beat the heat. Natural formations offer a refreshing break from the ...

Looking for a cooler way to spend summer? Skip the beach and explore underground attractions packed with history, mystery and natural beauty.

Stunning cave at 'centre of Earth' will kill you within minutes The Cave of Crystals has been described as one of the seven geological wonders on the planet - but tourists are banned because of ...