Excellent idea for a quiz. Nominated. I think though you need to change the description slightly, as Lake Bled isn't a city!
I wonder also whether "Rome" should be a type-in for the Vatican, as the Vatican is entirely within the city of Rome, so anything in the Vatican is also in Rome... but if you re-write your description then that might solve that little issue.
Really nice quiz, but, the Sagrada Familia is not the cathedral of Barcelona. The cathedral of Barcelona is dedicated to the Holy Cross and Santa Eulalia, and it's a different building... much much much older than the Sagrada Familia.
I wonder also whether "Rome" should be a type-in for the Vatican, as the Vatican is entirely within the city of Rome, so anything in the Vatican is also in Rome... but if you re-write your description then that might solve that little issue.