The Trolleybus Museum at Sandtoft, located between Doncaster and Scunthorpe, has over 60 historic trolleybuses in its collection. Many are in functioning order, and tourists can ride them on open days. The majority of their trolleybuses are from towns and cities around the United Kingdom, and they depict part of the social history of their heyday, which ran from the 1940s to the 1960s. They have a few notable cases from Europe, Canada, and New Zealand as well. The Museum also has a variety of other historic vehicles, many of which are diesel buses, to complement the trolleybuses. Trolleybuses are powered by 550 volts of DC mains energy drawn from specifically erected overhead wiring. They run on rubber tyres, just like regular buses, but emit no pollutants.