Found this on Creativity:
In the Swedish city of Gothenburg, many tourists pay for sightseeing tours when they could easily be seeing same sights from a public tram. So swedish ad agency, Forsman and Bodenfors (great site by the way, check them out!) came up with the idea for a Tram Sightseeing app for the city’s transport company Vastraffik. The app describes the sights as you pass them listening to headphones on your phone. The sights are geotagged and use the phone’s GPS to track your route. And the price is the same as for a tram ticket.