Las Cabezas de San Juan (Puerto Rico)

Cabezas de San Juan Nature Reserve
Reserva Natural de las Cabezas de San Juan
IUCN category V (protected landscape/seascape)
View of the historic lighthouse from Laguna Grande
Location in Puerto Rico
LocationCabezasParguera, Fajardo, Puerto Rico
Nearest cityFajardo, Puerto Rico
Coordinates18°23′N 65°37′W / 18.38°N 65.62°W / 18.38; -65.62
Area448 cda (435 acres)
Established1986
Governing bodyPuerto Rico Department of Natural and Environmental Resources (DRNA), Conservation Trust of Puerto Rico

Las Cabezas de San Juan (Spanish for 'the San Juan capes' or 'headlands'), officially Cabo San Juan (Cape San Juan in English), is a coastal area and nature reserve located in the northeastern corner of the main island of Puerto Rico, particularly in the Cabezas barrio of the municipality of Fajardo. The reserve is famous for its biodiversity, with its bioluminescent lagoon (Laguna Grande, one of the three year-round bioluminescent bodies of water in the territory and one of seven in the Caribbean), its coral reefs, and its subtropical dry and mangrove forests, and for its history, particularly for its lighthouse and its role during the Puerto Rico campaign of the Spanish–American War.