Cayo Luis Peña, formlerly South West Key is a small island off the west coast of Culebra

Culebra, Puerto Rico

Isla Culebra is an island-municipality of Puerto Rico originally called Isla Pasaje and Isla de San Ildefonso. It is located approximately east of the Puerto Rican mainland, west of St. Thomas and north of Vieques. Culebra is spread over 5 wards and Culebra Pueblo...

, a municipality of Puerto Rico

Puerto Rico

Puerto Rico , officially the Commonwealth of Puerto Rico , is an unincorporated territory of the United States, located in the northeastern Caribbean, east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands.Puerto Rico comprises an...

. The island is a nature reserve, but visitors are allowed on the island for nature walks, snorkeling

Snorkeling

Snorkeling is the practice of swimming on or through a body of water while equipped with a diving mask, a shaped tube called a snorkel, and usually swimfins. In cooler waters, a wetsuit may also be worn...

 and swimming. Visitors are not allowed to stay on the island overnight and the island is only accessible via private water taxis. This limited access results in relatively few visitors and the island and surrounding reefs are able to stay more pristine as a result. The small number of visitors also makes the island more private for those willing to make the journey. Luis Peña Beach is located on the north side of the island. The island is named after its second owner.