Viñales valley and a section of this Mountain Range where it is located became in 1999 a National Park and was declared by UNESCO a World Heritage Site in the category of Cultural landscape. This overwhelming landscape houses 17 botanical species and 47 archeological sites, most of them related to aboriginal communities and runaway African slaves. It features unique gigantic limestone hillocks, mogotes, honeycombed with cavities which resemble a huge church organ, therefore the name Sierra de los Organos, Organs Mountain Range.