The Crystal Palace, situated in El Retiro Park, is a stunning glass and iron structure that serves as an exhibition hall for contemporary art. It was originally built in the late 19th century to house exotic plants during an exhibition. Today, it hosts temporary art exhibitions and installations, showcasing the works of contemporary artists. The Crystal Palace's unique architecture, with its transparent walls and intricate ironwork, creates a captivating atmosphere for art enthusiasts. Visitors can admire the fusion of art and nature within this iconic landmark, making it a must-see attraction in El Retiro Park.