Astronomical Tower in the Clementinum

Housed in the Czech Republic’s massive national library, this provides a favorite panoramic view in Prague, as it allows you to take in the whole city, including the Charles Bridge. There is a catch: About 120 narrow spiral stairs, to be exact. But if you’re up for the climb, the reward is well worth it. Until the 1920’s the tower was used to calculate high noon, at which time a flag was raised for the castle to see, whereupon a cannon was fired to mark the hour. To get to the tower, you need to take the tour, which leaves hourly. On the way, you’ll see the absolutely amazing library built by the Jesuits, decorated with fantastic frescoes depicting knowledge, learning and wisdom.