Between Mona and Puerto Rico, ocean depths reach over 3,000 feet. Ocean depths close to Mona's cliffs are more than a hundred feet. Coral reefs surround the South coast where a myriad of keys protect more than five miles of white-sand beaches. What to do Mona offers over 13,000 acres of unspoiled ecological treasures. Camping is allowed only in the three beaches located on the South and South West of the island.
Trails join the three beaches up to the eastern point of the island where the lighthouse is located.
During the day, you can go hiking, bird watching, snorkeling or scuba. Activities can be coordinated with the resident biologist if you want to learn about the ecosystem of the island. It is required to visit the caverns with a guide. Star gazing at night may be the most unforgettable experience of a trip to Mona. Because of the darkness, the sky offers at night myriad of bright stars, a spectacular experience for the amateur astronomer equipped with a telescope.