This famous 512 m high mountain positions itself at the itself at the highest point on the Sierra de Collserola mountains in Barcelona. Don't forget a visit to Tibidabo if you're spending a few days in the city. The mountain began to be developed at the end of the 19th century with the most important and well known buildings including the Expiatory Church of the Sacred Heart of Jesus, the Collserola Tower and the Tibidabo theme park. The latter is the main tourist attraction; its Cami del Cel is a 500 m high walkway that has the best views of Barcelona.