Casa Batllo (World Heritage Site) - One of 2 houses by Gaudí in Barcelona that can be toured. truly amazing and worth the visit. go in the mornings, before the site gets crowded with architecture students.
Montserrat, Barcelona - Montserrat is a multi-peaked mountain located near the city of Barcelona, in Catalonia, Spain. It is part of the Catalan Pre-Coastal Range. The main peaks are Sant Jeroni, Montgrós and Miranda de les Agulles.
Barcelona - Stroll Las Ramblas: The most famous street in the city is a pedestrianized tree lined boulevard that has many green areas, restaurants and bars, with a range of market stalls and street traders.