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
Been there - loved it~ Milan, Italy - Duomo di Milano (Milan Cathedral) . "The cathedral church of Milan, Italy, this Gothic cathedral took nearly six centuries to complete. It is the fourth-largest cathedral in the world and the largest in Italy.
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.