On the palm-fringed Bahía Tenacatita, Playa Tenacatita has clear snorkeling waters and a large mangrove lagoon with good bird-watching. There is a land title in dispute here, with a development group in the process of trying to build on and partly privatize an otherwise public and relatively undeveloped beach. You can still visit, but camping is no longer allowed.
Playa Tenacatita

