Mount Roraima

Mount Roraima is the highest of the Pacaraima chain of tepuis or plateaux in South America.: 156  It is located at the junction of Brazil, Guyana and Venezuela. A characteristic large flat-topped mountain surrounded by cliffs 400–1,000 m high. The highest point of Mount Roraima is located on the southern edge of the cliff at an altitude of 2,810 m in Venezuela, and another protrusion at an altitude of 2,772 m at the junction of the three countries in the north of the plateau is the highest point in Guyana.

Source: Wikipedia