In the town of Río San Juan is this river-fed estuary leading to the ocean. Greeting you at the water is a picturesque collection of fishing boats. Here you hire a driver and boat from a cooperative (809/589–2277, daily 8–6) for a 90-minute trip (1,200 pesos for two people, cheaper with larger groups) down a mangrove outlet that teems with tropical seabirds. Graceful egrets, crabs scrambling up the mangroves and beautiful tiny fish playing in the sunlight dappled fresh water are all part of the waterscape. Once in the ocean, the boats follow the shore until reaching a tiny cave, Cueva de las Golondrinas, which is named for the swallows that flitter about. You can then swim to a series of virgin beaches. Bring snorkeling gear if you have it. Laguna Gri Gri (or Gri Gri Lagoon) has prominent signage throughout the town of Río San Juan which is on the north coast highway before you arrive in Cabrera. Make sure to call in advance for on some days if the sea is rough they won't go out.
Río San Juan, Dominican Republic