I climb to Montjuïc to say goodbye to Barcelona from the heights of its hillside, a spot where you can see the stunning Botanical Gardens, and museums such as the Joan Miró Foundation, the National Museum of Art in Catalonia and the Mies van der Rohe Pavilion.

I set off for Santa Coloma de Cervelló to visit the crypt of Colonia Güell, a spectacular work from Gaudí’s naturalist period. While the crypt is one of the architect’s seven World Heritage-listed buildings, it is also the least well-known work on that prestigious list.