The Iwokrama International Centre looks after about 371,000 hectares of forest - an area bigger than many countries. Trees here have been growing for thousands of years. Some of them are so thick that ten children holding hands cannot reach around the trunk. The forest is so dense and full of life that scientists keep finding new species of insects, frogs and plants.
The canopy walkway is a series of hanging bridges strung between the tallest trees, about 30 metres off the ground. From up there you can spot toucans, macaws and tiny hummingbirds going about their day in the treetops - things that are almost invisible from the forest floor below. Howler monkeys sometimes swing right past the walkway, looking just as curious about visitors as visitors are about them.
Iwokrama was set up with the help of Makushi Indigenous communities who have lived alongside this forest for generations. Local guides know the names, habits and stories of hundreds of plants and animals. Their knowledge helps scientists and visitors understand the forest in ways books alone never could.
At night, Iwokrama is just as busy as during the day. Giant river otters and tapirs come to the riverbanks to drink. Jaguars pad silently through the undergrowth. The sky above the forest, far from any town lights, is thick with stars.