The pedestrian walkway called the Paseo de la Princesa offers scenic views of Old San Juan. It was built in 1853 to allow Victorian-era residents to take their constitutionals along the water, outside the city walls. The promenade is lined with antique street lamps, and the walls of La Fortaleza tower overhead. Street vendors offer fresh fruits and piragua, a frozen treat made with shaved ice and flavored syrups.