Turtles and fish.
Peter Andersen — CC BY-SA 3.0 · No machine-readable author provided. MikeJ9919 assumed (based on copyright claims). — CC BY 2.5 · SILGOHI — CC BY-SA 4.0
A small forested island in the Pacific off the Osa Peninsula, a biological reserve ringed by coral reefs among Costa Rica's richest snorkelling and diving sites, with daily visitor numbers capped to protect it. Visitors spend most of the trip in the water: snorkelling over the reefs among shoals of colourful fish, sea turtles and rays, or diving near the rocks where small harmless reef sharks and barracudas pass. The water is clear most days. The island has a small beach and a short forest trail; it was a burial ground and sacred place for the region's ancient peoples, and polished Diquís stone spheres were found here. On the boat ride dolphins and, in season, whales often appear. The boat ride from Drake Bay takes about an hour and the sea can be choppy. Landing on the island is limited by reserve rules.
Turtles and fish.
By the rocks.
Dolphins and whales.
About 16 km off the Osa Peninsula, by boat from Drake Bay
Yes, its reefs are among Costa Rica's richest, visited on licensed trips from Drake Bay with capped numbers.