San Juan Antiguo

Casa de España is the headquarters of a private social organization whose members are those of Spanish descent in San Juan, Puerto Rico on Avenida de La Constitución in Old San Juan.

Old San Juan (Spanish: Viejo San Juan) is a historic district located at the "northwest triangle" of the islet of San Juan. Its area roughly correlates to the Ballajá, Catedral, Marina, Mercado, San Cristóbal, and San Francisco sub-barrios (sub-districts) of barrio San Juan Antiguo in the municipality of San Juan, Puerto Rico. Old San Juan is the oldest settlement within Puerto Rico and the historic colonial district of the city of San Juan. This historic district is a National Historic Landmark District and is listed on the United States National Register of Historic Places as the Old San Juan Historic District. Several historical buildings and structures, particularly La Fortaleza, the city walls, and El Morro and San Cristóbal castles, have been inscribed in the UNESCO World Heritage Site list since 1983. Historically the mixed use commercial and residential real estate in the main streets like Cristo Street, Fortaleza Street (north) from Tanca Street to the Governor’s Mansion is the most valuable in the area and it has kept its value and increased steadily through several years despite the past economic turmoils.

The Isleta de San Juan (Spanish for Islet of San Juan) is a 3-square-mile (7.8 km2) island in the San Juan Bay in the Atlantic coast of northern Puerto Rico. Home of Old San Juan, it is the site of the oldest permanent European settlement in Puerto Rico (1521), and the second oldest European settlement in the West Indies after Santo Domingo (1496). Due its strategic location in the Caribbean during the Spanish colonization of the Americas it is home to a city wall and a number of militaristic buildings such as El Morro Castle. Today it is also home to many of Puerto Rico's government buildings such as the territory's capitol building (El Capitolio).

The Ateneo Puertorriqueño (Puerto Rican Athenaeum), is a cultural institution in Puerto Rico. Founded on April 30, 1876, it has been called Puerto Rico's oldest cultural institution, however, it is actually its third oldest overall and second culturally, after the Bar Association of Puerto Rico and the Casino of Mayagüez.One of its founders was the playwright, Alejandro Tapia y Rivera. The Athenaeum was the first to give accolades and awards to artists and writers such as José Gautier Benítez, José de Diego, Manuel María Sama, Francisco Oller, Manuel Fernández Juncos, Lola Rodríguez de Tió and Luis Lloréns Torres.The Athenaeum serves as a museum, school, library, and performance hall for the arts in Puerto Rico. It hosts a number of contests, conferences, and exhibits each year, presenting Puerto Rican art, literature, and music. Since 1937 the use of the spaces of the Athenaeum has been limited to activities it sponsors. Its headquarters are located in Puerta de Tierra, adjacent to Old San Juan, in a strip that also houses the "Casa de España", the Carnegie Library, the Capitol complex and the Puerto Rico Olympic Committee headquarters.

San Juan National Historic Site (Spanish: Sitio Histórico Nacional de San Juan) in the Old San Juan section of San Juan, Puerto Rico, is a National Park Service-managed historic site which protects and interprets colonial-era forts such as Castillo San Felipe del Morro, bastions, powder houses, and three fourths of the old city wall.

The San Juan City Wall (Spanish: Murallas del Viejo San Juan) is a city wall that surrounds the western end of the Islet of San Juan, site of the historic Old San Juan district in San Juan, Puerto Rico. This defensive wall system was built between the 16th and 20th centuries to protect the city and the Bay of San Juan, a highly strategic point in the Caribbean. These walls, along with the defensive fortresses in Old San Juan (La Fortaleza, El Morro and San Cristóbal), form part of the UNESCO World Heritage Site-designated San Juan National Historic Site as they are characteristic examples of the historic methods of construction used in military architecture which adapted European designs and techniques to the special conditions of the Caribbean port cities.San Juan remains the only walled city under the United States jurisdiction, with walled cities like Boston, Charleston and New Orleans no longer having walls after the 18th century, although St. Augustine, Florida still retains several wall remnants. Examples of other North American walled cities that retain their ramparts are Quebec City in Canada and Campeche in Mexico. The bartizans (garitas) found along the walls are considered emblematic of the city of San Juan and a symbol of historic heritage preservation in Puerto Rico.

The Biblioteca Carnegie (or Carnegie Library) on Avenida Juan Ponce de León in Puerta de Tierra, San Juan, Puerto Rico is a NRHP-listed Carnegie library funded through a $100,000 donation from the Carnegie Foundation, becoming Puerto Rico's first purpose-built library when it was completed in 1915.

Castillo San Cristóbal is a fortress in San Juan, Puerto Rico. It was built by the Spanish to protect against land-based attacks on the city of San Juan. It is part of San Juan National Historic Site. Castillo San Cristóbal is the largest fortification built by the Spanish in the New World. When it was finished in 1783, it covered about 27 acres of land and partly encircled the city of San Juan. Entry to the city was sealed by San Cristóbal's double gates. After close to a hundred years of relative peace in the area, part of the fortification (about a third) was demolished in 1897 to help ease the flow of traffic in and out of the walled city. This fortress was built on a hill originally known as the Cerro de la Horca or the Cerro del Quemadero, changed to Cerro de San Cristóbal in celebration of the Spanish victories ejecting English and Dutch interlopers from the island of this name in the Lesser Antilles. At the time, it formed part of the insular territorial glacis of Puerto Rico. Castillo de San Cristóbal also contains five cisterns that were used for the storage of water during the ages of the Spanish Colony. They are extremely large (24 ft tall, 17 ft wide, and 57 ft long) and were used as bomb shelters during World War II.

The Capitol of Puerto Rico (Spanish: Capitolio de Puerto Rico) is located on the Islet of San Juan just outside the walls of Old San Juan. The building is home to the bicameral Legislative Assembly, composed of the House of Representatives and Senate. The building is located in the Puerta de Tierra sector of San Juan. The Capitol is also commonly referred to as the Palace of the Laws (Spanish: Palacio de las Leyes).

El Monumento de la Recordación (English: Monument of Remembrance) is a memorial monument and monolith erected in San Juan, Puerto Rico that honors Puerto Ricans who have fallen in combat in service of the United States Armed Forces. The monument was unveiled on May 19, 1996 as a granite wall engraved with the names of Puerto Rican soldiers who died during combat. As of 2009, the monument was etched with the names of more than 2,000 service members.The monument largely contains the names of soldiers who had a Puerto Rico address at their time of enlistment and/or death. If a soldier had a stateside address their name is most likely not on the monument. Because so many Puerto Ricans in the military list a United States address, their participation is underrepresented in statistics.A sculpture by Victor Gutierrez called Llama de la eternidad (Flame of eternity) is located in the center of monument.A service is held each year on Memorial Day at the Monumento de la Recordación. In 2019, attendees learned that two fallen soldiers from Puerto Rico had been recently identified as part of the Recovery of US human remains from the Korean War.

The Antiguo Casino de Puerto Rico, located at Avenida Ponce de León 1 in San Juan, Puerto Rico, is a Beaux Arts architecture style building dating from 1917. It was listed on the National Register of Historic Places in 1977.

Plaza Colón (Spanish for Columbus square or plaza), formerly called Santiago Square, is a plaza or public town square located in Old San Juan where the easternmost city walls and main city gate (Puerta de Santiago) used to be located. The square today is a popular meeting place and is often used as a starting point for sightseeing in Old San Juan as it is located close to the main cruise ship docks, numerous restaurants, cafés and gift shops, and important landmarks such as San Cristóbal Castle, Tapia Theater, the Old Casino and the Puerto Rico capitol.