The gorgeous Gothic tower guards the entrance to the Charles Bridge as it has since 1380. You can climb the stairs to the top of what is oft regarded as the most beautiful Gothic tower in Europe for a spectacular view of the River Vltava and parts of the city. This gateway to the old town has been a both a witness and a part of some ghastly history. The severed heads of anti-Habsburg rebels were displayed atop it in the 1600’s to act as a deterrent to other would-be dissenters. Who can say whether the deterrent worked or not but the decapitated criminals did ensure one thing: this is now a popular spot on all of Prague’s ghost tours.