· Arecibo Observatory: The Arecibo Observatory is part of the a national research center operated by Cornell University. It contains the world's largest single-dish radio telescope. This Observatory is known as one of the most important centers to study and research radio astronomy, planetary radar and terrestrial aeronomy.
· Cueva Del Indio Cavern: Cueva de Camuy contains the largest number of petroglyphs found along the coastal zone and in 1992. The Planning Board of Puerto Rico listed Cueva Del Indio as a Natural Reserve. Now the cave is managed by the Puerto Rico Department of Natural and Environmental Resources. It is believed that the Taino Indians, who carved the petroglyphs, held tribal meetings before the Spanish Invaders came (1493).
· Cambalache Forest Reserve: known as a nursery because it contains plantations of eucalyptus, and mahoe trees.
Beaches
· Los Morillos: this beach is located at Cabo Rojo. It contains a light house, built in 1881. This light house was used in the 19th century when Spain’s government wanted to keep safe Puerto Rico’s coast.
· Museum of Art and History: was built in 1855 this location served as the city’s marketplace. The museum contains Spanish colonial architecture.
Barceloneta: also known as the Pineapple City, because of its huge pineapple plantations surrounding the city.
· Forests of Camblache: It is located between Barceloneta and Arecibo. It protects steep mogotes(steep limestone hills), which are covered in moist forests.
Camuy:
· Rio Camuy Caverns: The caves at Camuy are 45 million years old. The caves contain ceilings with crystalline stalactites, walls with flowing stone tapestries and their floors with mushroom mounds of stalactites.
· Lake Guajataca: Lake Guajataca is located between Quebradillas and Isabela. It is a man made lake surrounded. In it’s rainforest there are Fishing Eagles, White Cranes and other birds fish.
Manati: known for its waterts having a great abundancy of mantis.
· La Atenas De Puerto Rico: It is a fertile that contains a series of, lagoons, beaches and the impressive and mighty Grande de Manatí River.