One of my favorite places in the city to watch the sunset! You'll find many locals here lounging around, some with a full on picnic set up (Spanish guitar and all), others just walking their dogs and people watching. Bring a bottle of wine or a few beers and watch the city go from day to night. The temple itself is free to enter during specific hours. I'll spare the details on the history as it is much better to learn about in person.Have a great photo-op and walk around the park. If you hit the right corner, you'll also find yourself with one of the best views of the Palacio Real (Royal Palace).