Mount Roraima is the highest of the Pakaraima chain of tepui plateaus in South America. First described to Europeans by the English explorer Sir Walter Raleigh during his 1595 expedition, its 31-square-kilometre (12-square-mile) summit area is bounded on all sides by cliffs rising 400 metres (1,300 ft). The mountain also serves as the tripoint of Venezuela, Guyana and Brazil. Raleigh learned about it from indigenous peoples, who lived there before the European invasion of the 15-1600's.
The only non-technical route to the top is the Paraitepui route from Venezuela; any other approach will involve climbing gear. Mount Roraima has been climbed on a few occasions from the Guyana and Brazil sides, but as the mountain is entirely bordered on both these sides by enormous sheer cliffs that include high overhanging (negative-inclination) stretches, these are extremely difficult and technical rock climbing routes. Such climbs would also require difficult authorizations for entering restricted-access national parks in the respective countries.