Nerja Cave is a natural archaeological site, famous for its large galleries, home to the world¿s thickest column, produced through the fusion of a stalactite and a stalagmite, and also for its prehistoric paintings. This is why it is traditionally known as the Cathedral of Prehistory and has the National Historic-Artistic Monument designation. There are guided tours that will take you to the main halls, such as Belén (Crib), Colmillo (Tooth), Cascada (Waterfall), Fantasmas (Ghosts), Cataclismo (Cataclysm) and Órganos (Organs). There is a music and dance festival held here every year in July.