Lajas (Spanish pronunciation: [ˈlaxas], locally [ˈlahaʔ]) is a town and municipality located in the Lajas Valley in southwestern Puerto Rico, bordering the Caribbean Sea, south of San Germán and Sabana Grande; east of Cabo Rojo; and west of Guánica. Lajas is spread over 11 barrios plus Lajas Pueblo (the downtown area and the administrative center of the city). It is part of the San Germán-Cabo Rojo Metropolitan Statistical Area.
The Mayagüez metropolitan area (Spanish: área metropolitana de Mayagüez), is the fourth largest metropolitan statistical area (MSA) in Puerto Rico, comprising the municipalities of Mayagüez, Cabo Rojo, San Germán, Lajas, Sabana Grande, and Hormigueros between the coastal plains and the Cordillera Central mountain subrange in the southwestern region of the main island. One of 6 metropolitan statistical areas in Puerto Rico, it lies within the Mayagüez–Aguadilla combined statistical area (CSA), which is one of 3 primary statistical areas in the main island as defined by the United States Census Bureau. As of 2023, census estimates place the population of the Mayagüez metropolitan area at 207,877.
La Parguera Nature Reserve (Spanish: Reserva Natural de la Parguera) is a protected area located in the southwestern Puerto Rico, primarily in the municipality of Lajas but also covering cays and islets under the municipal jurisdictions of Guánica and Cabo Rojo. The nature reserve is itself a unit of the Boquerón State Forest and it protects the Bahía Montalva mangrove forest in addition to mangrove bays, salt marshes and lagoons located along the coast of the Parguera barrio of Lajas, including its numerous cays and coral reefs. The reserve is mostly famous for its bioluminescent bay, locally called Bahía Fosforecente, (Spanish for 'phosphorescent bay'), one of the three of its kind in Puerto Rico and one of the seven year-round places where bioluminescent can be seen in the Caribbean.
Guánica (Spanish pronunciation: [ˈɡwanika], locally [ˈwanika]) is a town and municipality in southern Puerto Rico, bordering the Caribbean Sea, south of Sabana Grande, east of Lajas, and west of Yauco. It is part of the Yauco metropolitan statistical area.
Guánica barrio-pueblo, also known as Pueblo de Guánica, is the downtown of the municipality. Guánica's population in 2020 was 13,787 people. Guánica is located on a deeply indented harbor of the same name. The harbor resembles a tropical fjord, narrow and bordered by rugged hills, barely a quarter-mile wide, but about two miles (3.2 km) from mouth to the town. The town is about 100 miles (160 km) and over two hours' driving distance from San Juan, and about 20 miles (30 km) west of Ponce.
Boquerón State Forest (Spanish: Bosque Estatal de Boquerón) is one of the 20 forestry units that make up the public forest system of Puerto Rico. Despite its name, the Boquerón State Forest is not only located in Boquerón, Cabo Rojo but also spans almost 5,000 acres across the municipalities of Cabo Rojo, Lajas and Mayagüez. The forest area is also known for its limestone cliffs, the lighthouse, and the salt flats which have been a source of salt since the pre-Hispanic era and, dating to 700 C.E., they are considered to be one of the oldest industries in the Americas.
Parguera is a barrio in the municipality of Lajas, Puerto Rico with a population of 2,082 in 2010. La Parguera is the main settlement of the barrio, often referred to as Poblado de la Parguera. Parguera is home to La Parguera Nature Reserve, which encompasses the bioluminescent bay, its surrounding mangrove forests, wetlands and a number of keys such as Mata La Gata and Cayo Enrique. The name Parguera derives from pargo, the local name for the Northern red snapper (Lutjanus campechanus).