More than a thousand bells were created, but only 50 of them were considered good enough for De Zingende Toren. These specially tuned bells are flanked by the same number of so-called 'wild' bells with peculiar, out of tune and erratic sounds. The result of this bizarre, yet successful experiment is a piece of musical art located at the Vleuterweide that's shopping centre that's 30m high. It's interesting to note that the design by artist Bernard Heesen is not completely unique. Tsar Peter the Great used to have a water-powered glass chime in his garden that was slightly similar to this 2009 creation. But today Utrecht has the only crystal carillon in the world. You can attend a free concert every first Wednesday (14:00) and third Saturday (11:00) of the month.