Palacio De Cristal was built in 1887 by Ricardo Velázquez Bosco. It was built to show case flora and fauna from the Philippines. Today it is under the control of the Reina Sophia meseum. It is used as an art space. The lake in front is filled with fish, ducks, and it least from what I could tell, three species of turtles. The Palacio De Cristal is located in the middle of Parque Del Burn Retiro. Which makes for a really relaxing place. But don't get me wrong the place is very lively and full of people and artists finding inspiration in this beautiful place.