This is a list of properties and historic districts that are listed on the National Register of Historic Places (NRHP) in Puerto Rico, not to be confused with the Puerto Rico Register of Historic Sites and Zones. There are more than 375 listings in Puerto Rico, with one or more listing in each of Puerto Rico's 78 municipalities.
The La Plata River is the longest river in Puerto Rico. It is located in the north coast of the island. It flows from south to north, and drains into the Atlantic Ocean about 11 miles (18 km) west of San Juan. The mouth of the river is a resort area with white sandy beaches.
Puerto Rico Highway 1 (PR-1) is a highway in Puerto Rico that connects the city of Ponce to San Juan. Leaving Ponce, the road heads east and follows a somewhat parallel route along the southern coast of the island heading towards Salinas. At Salinas, the road turns north to cut through the Cordillera Central in its approach to San Juan. Before reaching San Juan, it climbs to make its way to the mountain town of Cayey and then it winds down into the city of Caguas on its final approach to San Juan.
Puerto Rico Highway 115 (PR-115) is a highway which follows the west coastline of Puerto Rico from south Añasco at PR-2 to near downtown Aguadilla, where it becomes Puerto Rico Highway 111 after intersecting PR-2 again, and is the primary route to the town of Rincón, Puerto Rico, a tourist and frequent destination of surfers.
Puerto Rico Highway 31 (PR-31) is a main, rural highway connecting Juncos at Puerto Rico Highway 198 to Naguabo at Puerto Rico Highway 3.
Puerto Rico Highway 14 (PR-14) is a main highway connecting Ponce to Cayey, Puerto Rico. The road runs the same course as the historic Carretera Central. The Ponce-to-Coamo section of PR-14 was built under the direction of Spanish engineer Raimundo Camprubí Escudero.
Puerto Rico Highway 15 (PR-15), formerly Road No. 4, is a main highway connecting the municipalities of Guayama and Cayey in Puerto Rico. With a length of 25.80 km (16.03 mi), it extends from PR-3 in downtown Guayama to PR-14 in downtown Cayey.
Puerto Rico Highway 167 (PR-167) is one of the main highways in the San Juan–Caguas–Guaynabo metropolitan area of Puerto Rico. Highway 167 starts at Puerto Rico Highway 165 in Levittown and goes until Puerto Rico Highway 156 in Comerío.
Plata Bridge, listed in Puerto Rico's bridge inventory as Bridge #374 and now also known as Antiguo Puente Plata, was built in 1908. It is significant as "the only extant large multi span truss bridge in Puerto Rico", according to its nomination document for listing on the National Register of Historic Places. It includes two Parker truss spans and was built in 1908. It brought what is now Puerto Rico Highway 167 across the Rio La Plata, spanning from Bayamon municipality and into Naranjito, and connected several mountain towns to the coastal road along Puerto Rico's north coast.
Avenida Juan Ponce de León, coextensive as Puerto Rico Highway 25 (PR-25) along its entire length, is one of the main thoroughfares in San Juan, Puerto Rico.
The Arenas Bridge is a truss bridge built in 1894 between the municipalities of Cayey and Cidra in Puerto Rico. Also known as Puente Rio La Plata, it was the longest bridge constructed in Puerto Rico during the Spanish colonial period. It crosses the Rio de la Plata, the longest river in Puerto Rico. According to the U.S. National Park Service, "[t]his is the most important metal bridge in Puerto Rico from the period." The bridge is still standing.
The Carretera Central is a historic north–south central highway in Puerto Rico, linking the cities of San Juan and Ponce by way of Río Piedras, Caguas, Cayey, Aibonito, Coamo, and Juana Díaz. It crosses the Cordillera Central. Plans for the road started in the first half of the 19th century, and the road was fully completed in 1898. At the time the United States took possession of Puerto Rico in 1898, the Americans called it "the finest road in the Western Hemisphere."
This portion of National Register of Historic Places listings in Puerto Rico is along the central mountain region, from Las Marías and Maricao in the central-west to Juncos in the central-east, including the slopes of the Cordillera.
The Cayey Bridge, also known as Puente de Cayey, is an iron lateral lattice girder bridge in Puerto Rico that was built in 1891. It brings Puerto Rico Highway 15 over the Guamaní River. Despite its name, its actually closer to the city of Guayama and not Cayey.
The La Liendre Bridge, spanning Beatriz Creek, a tributary to the Río de la Plata, between Cayey, Puerto Rico and Cidra, Puerto Rico. It was built in 1877 and was listed on the National Register of Historic Places in 1995, and on the Puerto Rico Register of Historic Sites and Zones in 2000.
Puerto Rico Highway 873 (PR-873) is a north–south road located between the municipalities of San Juan and Guaynabo, Puerto Rico, and it corresponds to an original segment of the historic Carretera Central. The General Norzagaray Bridge is located on this route.
Puerto Rico Highway 798 (PR-798) is a road located between the municipalities of Caguas, Puerto Rico, and San Juan, and it corresponds to an original segment of the historic Carretera Central. La Concepción Bridge is located on this route.
Puerto Rico Highway 693 (PR-693) is a road located between the municipalities of Dorado, Puerto Rico and Vega Alta, passing through downtown Dorado. It begins at its intersection with PR-2 and PR-165 in Río Lajas and ends at PR-690 in Sabana. It is a short divided highway in southern Dorado, which serves as an alternate route for PR-165 west of Río de la Plata.
Puerto Rico Highway 135 (PR-135) is a rural road that travels from Adjuntas, Puerto Rico to Lares. This highway begins at PR-123 north of downtown Adjuntas and ends at PR-128 in Bartolo.
The Río Matón Bridge, in Matón Abajo, a barrio of Cayey, Puerto Rico, was built in 1886. It was listed on the National Register of Historic Places in 1995 and on the Puerto Rico Register of Historic Sites and Zones in 2000.
PR-1 in Monte Llano–Cayey barrio-pueblo 
PR-1 in Vegas 
Arenas Bridge
La Liendre Bridge
