On a rainy afternoon in El Retiro Park, you can enjoy a live concert at the Palacio de Cibeles. This historic building, located near the park, hosts a variety of cultural events, including music concerts featuring both local and international artists. Check the schedule and see if there's a concert happening during your visit. The grandeur of the palace combined with the beautiful melodies will create a memorable experience, allowing you to escape the rain and immerse yourself in the world of music.