I think anyone who visits Madrid must go at least once to the Retiro park. It has got to be one of the most beautiful park ever. I went to Retiro yesterday because all my roommates went on vacation (except me!!) so I decided to spend the day in the park. It's very lively on Sundays. There are so many things to do. A lot of families visit the park and spend the entire day in Retiro. Since Madrid is getting quite hot already, a lot of people were sunbathing. I thought I was on the beach! Anyway, all is good and I really had a great time. During Sundays as well some people play the bongo near the lake. A lot of people gather around the steps beside the lake and have mini-parties. Also, during the weekends, puppet shows and other children's activities are held all over the place. If you have children, I am sure they will have fun visiting the park.