Pete Oxford / Kaieteur Falls is the world's widest single drop waterfall, located on the Potaro river in the Kaieteur National Park, in Essequibo, Guyana, South America

Pete Oxford / Kaieteur Falls where the Potaro River runs into the Essequibo River, Kaieteur National Park, Guyana

Pete Oxford / River in rainforest, Essequibo River, Rupununi, Guyana

Pete Oxford / Cane Toad (Bufo marinus) on riverbank, Essequibo River, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Kaieteur Waterfall where the Potaro River runs into the Essequibo River, Kaieteur National Park, Guyana

Pete Oxford / Rainforest and Essequibo River, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Essequibo River, Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Gold dredger on Essequibo river, the longest river in Guyana, South America

Pete Oxford / Looking down on old plane crash in Essequibo river, the longest river in Guyana, South America

Pete Oxford / Spectacled caiman (Caiman crocodylus) seen from the air in Essequibo river, the longest river in Guyana, South America

Pete Oxford / Aerial view of Essequibo river, the longest in Guyana, Iwokrama, Rurununi, Guyana, South America

Pete Oxford / Iwokrama Lodge, tourist accommodation in Iwokrama Reserve, on the Essequibo river, the longest in Guyana, South America