Risco Caído Monument · Artenara, Gran Canaria - Oeste, Las Palmas Complex of 21 artificial caves cut into the Barranco Hondo, among them the so-called cave number six, a lunisolar astronomical marker or temple whose dome produces optical phenomena linked to the aboriginal calendar. It is the element that gives its name to the Cultural Landscape of Risco Caído and the Sacred Mountains of Gran Canaria, declared a UNESCO World Heritage Site on 7 July 2019. declaración UNESCO el 7 de julio de 2019 Photo: El Coleccionista de Instantes Fotografía & Video (CC BY-SA 2.0) What to see and do in Artenara