Old San Juan is the oldest settlement within Puerto Rico and it is the historic colonial section of San Juan

San Juan, Puerto Rico

San Juan , officially Municipio de la Ciudad Capital San Juan Bautista , is the capital and most populous municipality in Puerto Rico, an unincorporated territory of the United States. As of the 2010 census, it had a population of 395,326 making it the 46th-largest city under the jurisdiction of...

, Puerto Rico

Puerto Rico

Puerto Rico , officially the Commonwealth of Puerto Rico , is an unincorporated territory of the United States, located in the northeastern Caribbean, east of the Dominican Republic and west of both the United States Virgin Islands and the British Virgin Islands.Puerto Rico comprises an...

.
Old San Juan is located on a small and narrow island which lies in the north coast, about 35 miles (56.3 km) from the east end of Puerto Rico, and is united to the mainland

Mainland

Mainland is a name given to a large landmass in a region , or to the largest of a group of islands in an archipelago. Sometimes its residents are called "Mainlanders"...

 of Puerto Rico by the three bridges. It is bounded by the Atlantic Ocean to the north and to the south by San Juan Bay or "Bahia de San Juan" which lies between the city and the mainland.