Carlsbad Caverns
/ˌkɑːlzbæd ˈkævənz/
/ˌkɑːrlzbæd ˈkævərnz/
- a series of beautiful underground caves in the US state of New Mexico. They were discovered in 1901 and are more than 40 miles/64 kilometres long. The Carlsbad Caverns National Park was made a World Heritage Site in 1995.