San Juan Antiguo is located entirely within the
Isleta de San Juan. Measuring 1.02 square miles (2.6 square kilometers) across, the barrio is coextensive with the
isleta. The total jurisdiction including water spans 2.63 square miles (6.8 square kilometers). This total area includes the isleta, several reefs and islets located around the main isleta, and portions of the
San Juan Bay, the
San Antonio Channel (
Caño San Antonio) and the
Condado Lagoon. Despite being located in an islet, the barrio is relatively hilly and rocky, with only the eastern and southern coasts being relatively flat. Due to the continuous levels development of the fortification systems across the islet, its topography has drastically changed throughout its history. At approximately 140 feet (42 m) of elevation above sea level, the former highest point of both the
barrio and the islet was located at the promontory of
El Morro at the northeastern tip of the islet, now occupied by the
Castillo San Felipe del Morro. Another former highest point was located at the current
Castillo San Cristóbal. Other elevations include
Loma de los Vientos located near the
Capitol of Puerto Rico, and Las Ánimas Hill (
Loma de las Ánimas), which at 128 feet (39 m) is the highest still-existing natural point of the islet. Although several man-made ditches and drainage systems have been built throughout its history, no natural rivers, creeks or bodies of fresh water have ever existed in San Juan Antiguo.
Cityscape The urban development of San Juan Antiguo is centered around the subbarrios of
Catedral,
Mercado,
San Cristóbal and
San Francisco, located at the east-central portion of the islet of San Juan, particularly around Catedral, the location of the city's
main Roman Catholic church and
city hall. This urban core represents the original Spanish-founded settlement from around which the rest of the islet was populated. The subbarrios of
Ballajá and
Marina were later established as part of the development of the military barracks built to supply
El Morro Castle and the establishment of the
main port of the city of San Juan, respectively. As this urban core was walled-off throughout the development of the fortification system of San Juan, various city gates were built to allow access into the town. The land-facing gate, colloquially known as
Puerta de Tierra (Spanish for 'land gate'), gave way to the westward urban sprawl in the city.
This district today hosts the
Capitol of Puerto Rico, and is the largest and most populated in San Juan Antiguo.
Subbarrios San Juan Antiguo is divided into the following
subbarrios: •
Ballajá •
Catedral •
Marina •
Mercado •
Puerta de Tierra •
San Cristóbal •
San Francisco == Demographics ==