El Retiro Park is a lush oasis in the heart of Madrid, covering over 125 hectares with more than 15,000 trees. Recently named a UNESCO World Heritage Site, it's a favorite spot for locals and tourists alike to stroll, jog, or rent a rowboat on the lake. With beautiful gardens, interesting sculptures, and even a puppet theater, El Retiro is the perfect place to relax and enjoy nature in the middle of the city. We recommend row-boating here!