Vallée de Mai Nature Reserve is a nature park and UNESCO World Heritage Site (inscribed in 1983) located on the island of Praslin, Seychelles. It consists of a well-preserved palm forest made up of the endemic Coco de Mer species, as well as five other endemic species of palm. These palms have the largest seeds of any plant in the world. The trees' leaves grow up to 6 metres wide and 14 metres long. Also unique to the park is its wildlife, which includes endemic birds, mammals, crustaceans, snails, and reptiles.