Crystal Palace, Madrid
When you visit Madrid, don’t forget to stroll around in one of its biggest park "Parque Del Retiro" (Retreat Park). The Parque del Buen Retiro named by Madrid's king is a large and popular, 1.4 km² (350 acres) park in Madrid city center, not far from the Prado Museum. And just at the heart of the Park you will find Palacio de Cristal (Crystal Palace). Palacio de Cristal is a very lovely building made of metal and glass, built in 1887 as a winter garden for exotic plants.