East of Puerto Rico, Vieques Island is known for its beaches and horseback riding. The long, skinny island has several US Wildlife reserves and DRNA reserves covering about two-thirds of the island.
A popular area is Reserva Natural Bahia Puerto Mosquito, which is also called Cano Hondo. It is a nice place to camp even with the rampant petty theft. There is a turtle nesting area and three world class beaches.
Note: there are two roads on the island subject to closure: Playa Caracas to Red Beach and Punta Arenas to Green Beach.