A DAY IN BARCELONA Montjuic Mountain   Do you already know the entire Gothic quarter of Barcelona and the Sagrada Familia? Do you want to do something different while enjoying part of the city's most recent history as well as incredible views?   Montjuic Mountain has witnessed the last century and will show us a different Barcelona.   There have been TWO major events that Montjuich hosted in the 20th century and that completely changed the city: - Universal E