biological reserve is an island off the Corcovado
National Park on the Osa Penninsula. The island has
an area of some 200 hectares but the reserve also
includes 2,700 hectares of sea floor. The reserve
was founded in 1978.
island was an indian sacred burial ground. There are
also indications that the island was an important
trading point for the entire coast of this region.
There are a number of stone spheres like those in
Diques in mainland Costa Rica.
The island is covered by wet, tropical forest with
trees of up to 50 meters, including specimens of the
famous "cow tree", whose sap can be drunk and which
was once used as emergency food for slaves.
There is not very much in the way of land fauna due
to the small size of the island, but the park protects
an impressive list of marine species.