Vallvirera is a district of Barcelona, Catalonia, in one of the sides of the Collserola hills (Tibidabo being one of those). There are excellent views over the city and the Mediterranean from Vallvidrera, on a clear day it's possible to see the peaks of Mallorca on the horizon. To the north, the snow-capped Pyrenees can often be seen. It used to be a cool summer retreat where wealthy people from Barcelona had their summer houses, now the wealthy live there all year round.