The adventure takes place on the Tárcoles River, one of four rivers flowing out into the Nicoya Peninsula, home of one of the world’s largest crocodile populations in the wild, with up to fifteen feet long specimens. Besides the crocodiles, over fifty species of birds can be seen on site, including the very rare scarlet macaw and a great variety of resident and migrant waterfowl. Iguanas and Jesus Cristo lizards are very common as well.