My pick
My tip“Rent a boat on the lake in the morning, and visit the Palacio de Cristal (free). Set aside at least two hours, and enter through the Puerta de Alcalá.”
Madrid's lungs and the old royal palace garden (125 hectares), inscribed on UNESCO's World Heritage List together with the Paseo del Prado. It has the great lake with its boats, the Crystal Palace and the rose garden.
Address
Plaza de la Independencia, 7