Impressively in use now for over 1,500 years, it was originally inhabited by Arawak and Caiquetio Indians who left behind both intricate petroglyphs and cave paintings. Centuries later, the extensive underground cave system acted as a refuge for runaway slaves from the plantations. Formed over the course of many millennia, their various shapes and silhouettes make for a spellbinding sight, particularly as they are illuminated by lots of little lights.