The triple border is situated 2 km to the west on the island of San José in the Rio Negro (Amazon).

The adjacent municipalities from the Colombian and the Brazilian side are Inírida, Guainía and São Gabriel da Cachoeira in the Amazonas State respectively.

There is a road (BR-307) that connects the border post of Cucuí in the Brazilian side with the city of São Gabriel da Cachoeira.

The region has been inhabited for thousands of years by indigenous groups including Baniwa, Karupaka (Kurrin), Karry (Karutama) who belong to the language family Arawak.

The main economic activity has been the traditional exploitation of gold which has generated conflicts between the indigenous and miners (known as garimpeiros).