Pop-up art galleries, late-night bars and street murals lend old San Telmo a bohemian vibe. Lined with antiques dealers and raucous steakhouses, Defensa street cuts through Plaza Dorrego, where a flea market and street performers attract tourists every Sunday. In Parque Lezama, paths wind around tall jacaranda trees and the Italianate Museo Histórico Nacional. Upscale tango dinner-show venues dot the neighborhood.