There are a number of UNESCO World Heritage Sites in Barcelona the most famous being La Sagrada Família. The others are no less remarkable and include the Hospital de Sant Pau (which also houses the Catalonia national library), the concert hall Palau de la Música Catalana, the gardens of Park Güell, the Gaudi designed Casa Milà, Casa Batlló, the Palau Güell, Casa Vicens and the crypt in Colonia Güell. These buildings alone warrant a days touring of the city.