The Christopher Columbus Monument at Plaza Colón marks the border of Old San Juan. As you continue your walking tour headed west, you enter the Capital District in the Puerta de Tierra sector. The first structure to admire has an elegant French Beaux Arts façade yet a misleading name. The Old San Juan Casino is not a casino. It was a club for the social elite when it opened in 1917. The property was later repurposed as an officers’ club, a music school and finally the Institute of Puerto Rican Culture. Today, Antiguo Casino de Puerto Rico is a special event venue for weddings and company meetings. It is listed on the National Register of Historic Places.