La Sagrada Familia, Spain - is a cathedral still under construction in Barcelona. Work on the cathedral started in 1882 and Gaudi himself worked on it for 40 years, 15 of which he dedicated exclusively to it, until his death in
Barcelo, Spain, 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.
SPAIN - The Benedictine monastery of Santa Maria de Monserrat is built into the mountain and offers visitors a staggering view. Monserrat is translated 'sawed mountain'. It is about 45 km northwest of Barcelona.