San Salvador's economy is based mostly on the service sector. The city has many restaurants and shopping malls, including Metrocentro, the largest shopping mall in Central America, as well as retail stores such as Wal-Mart, Office Max, and a Pricesmart warehouse club. The tallest shopping mall in the region, Centro Comercial Galerias, was built around and over an old mansion, ''La Casona'', dating from the late 1950s, which was home to a family of Spanish origin, the Guirolas.