evidence: • The Maroni River Natural border with Suriname, the Maroni is the longest river of Guiana. Going down part of the Maroni is a must because it is an essential communication route to the villages of Guyana. Several islands and 90 rapids punctuate its course: a real change of scenery! [...] Essential activities in French Guiana – Amazonia • Attend the laying of leatherback turtles on the beaches of Amana Located between the Organabo River and the Maroni River, this reserve is one of the world's most important sites for the laying of four species of sea turtles: the leatherback turtle, the green turtle, the olive ridley turtle and, rarer, the hawksbill turtle. It is also home to 286 species of birds and many mammals.