Mount Roraima is the highest of the Pakaraima chain of tepuis (table-top mountain) or plateaux in South America. It is located at the junction of Venezuela, Brazil, and Guyana.
A tepui is a tabletop mountain or mesa found in South America, especially in Venezuela and western Guyana. The word tepui means “house of the gods” in the native tongue of the Pemon, the indigenous people who inhabit the Gran Sabana.
A characteristic large flat-topped mountain surrounded by cliffs 400 to 1,000 meters high. The highest point of Mount Roraima is located on the southern edge of the cliff at an altitude of 2,810 meters in Venezuela, and another protrusion at an altitude of 2,772 meters at the junction of the three countries in the north of the plateau is the highest point in Guyana. The name of Mount Roraima came from the native Pemon people, the original inhabitants of Canaima National Park.
Mount Roraima is a flat-topped mountain, typical of the Guyana Shield, with an elevation of about 1,200 meters in the southeast and only about 600 meters in the northwest. The south, southeast, east, northeast, and northwest faces are all formed by straight cliffs up to about 1,000 meters high. At the southern end of the mountain, part of the cliff has collapsed, forming a spectacular natural boulder. The base of the cliff is surrounded by steep slopes to the south and east, and the north and west sides form river valleys leading to the summit.
Roraima is largely sandstone without much vegetation with a few sparse bushes all around. The unique and isolated nature of Roraima makes it home to many unique species of flora and fauna. It is truly a prehistorical island.
According to Wikipedia