El Retiro Park.

Once a private royal retreat for King Felipe IV, El Retiro now serves as Madrid’s central green lung and a sprawling 350-acre stage for local life. The landscape is a mix of manicured geometry and lively public spaces, centered around a large artificial lake where rowboats circle the massive Monument to Alfonso XII. Architecture enthusiasts gravitate toward the Palacio de Cristal, a striking glass and iron pavilion built in 1887 that now hosts rotating contemporary art installations. Beyond the main paths, the park reveals specialized corners like the Rosaleda rose garden, the statue-lined Paseo de la Argentina, and the Parterre, home to some of the city's oldest trees. Whether you are there for a morning jog, a puppet show, or a quiet stroll, the park remains the city's most elegant escape.