Río Piedras is a highly urbanized commercial and residential district in San Juan, the capital municipality of Puerto Rico. Adjacent to the Hato Rey business center and concentrated in the barrios of Pueblo, Universidad, Hato Rey Sur, El Cinco, and Monacillo Urbano, it is about 4 to 7 miles from the Old San Juan historic quarter, Condado and Isla Verde resort areas, and SJU airport. From Wikipedia
