The Most Beautiful Caves in the World

Caves typically conjure images of spelunking horror movies, or fairy-tale baddies. But in reality, the structures are among some of the most stunning, untouched geological formations on the planet—just look at the vibrant red rocks of Antelope Valley, the glittering ice caverns of Iceland's glaciers, or the underground grottos of Southeast Asia, replete with sacred monuments. They may not be easily accessible, but that just makes the most beautiful caves in the world all the more alluring to witness.