Superstar graffiti artists are helping to revive the rough neighborhood surrounding Casa Ronald, a 1920 architectural masterpiece. Now a center for creatives, Monumental Callao incorporates restaurants and artists’ studios, as well as galleries, with tenants intermittently donating their time to the surrounding community. Every weekend you can find rooftop parties with DJs or live salsa concerts, and even fashion shows using the colorful Spanish-style tiling as the catwalk.