When I went to Prague three months ago we got a free bus ride to our hotel from a tour company. The tour guide told us "embrace yourselves because you are about to visit the most beautiful European city". The tourists laught a bit because they thought he was exaggerating. But he said he's been to them all and he knows his stuff. And he was not wrong. What I personally like more about Prague is actually it's 1900's architecture- rather than the earlier styles. But everything is pretty.