It is a tilted, heavily eroded plateau, with a deep canyon in its central portion (Cañón Grande), drained by the Baria River.

[4] Pico da Neblina is inside Brazilian territory, but only a few hundred metres from the Venezuelan border.

Pico 31 de Março/Phelps is Brazil's second-highest mountain and the highest in Venezuela outside of the Andes.

[6][8][9] In January 1999, a group of carnivorous plant enthusiasts climbed Pico da Neblina following a 30 km hike up the previously unexplored northeastern ridge.

[4] Maguire's passage to Venezuela was provided by Gulf Oil executive Willard F.