The Prague Metronome is a 75-foot-tall functioning metronome located in Letná Park, overlooking the Vltava River and Prague's city center. It was erected in 1991 on the site of a former monument to Joseph Stalin. Designed by artist Vratislav Novák, the red metronome swings at either 4 or 6 beats per minute and offers a scenic view of the city. Nowadays, it's a popular meeting spot for skateboarders and visitors alike.