Right in the heart of the Old Town Square, you'll find our beloved astronomical clock, the Orloj. Make sure to arrive a few minutes before the hour to catch the charming procession of the Twelve Apostles. For a truly breathtaking perspective of the city's "hundred spires," climb the Old Town Hall Tower; the view from the top is absolutely worth it and gives you a real sense of Prague's magical layout. While watching the clock from the square is free, there is a fee to ascend the tower.