Mount Roraima ( , also known as
Tepuy Roraima and
Cerro Roraima; ) is the highest of the
Pakaraima chain of
tepui plateaus in
South America. First described by the English explorer
Sir Walter Raleigh in 1596, its summit area is bounded on all sides by cliffs rising . The mountain also serves as the triple border point of
Venezuela (85% of its territory),
Guyana (10%) and
Brazil (5%).