On the above right, you can see a small lake surrounding a statue. Many couples and quartets rented a little boat and for just 6 euros per boat, you can spend 45 minutes rowing back and forth on the lake admiring the beauty around you. Here, there was not only economic sustainability, but also environmental sustainability - for such an affordable price, you can spend an afternoon opening a bottle of wine and taking pictures on the boat, which brings me to cultural sustainability. We personally got to witness the botellon phenomenon in which Spanish teens gather at common places to drink. The Glass Castle on the above left is a free site to visit at this park which preserves the architectural wonder and the beautiful black swans and wildlife in the vicinity.
Overall, great first day in Madrid! Can't wait to see what other surprises await :)