Storytude is a website and app for Android and iPhone that lets you find stories based on your location. The fictional stories based on read-world locations can be called up as a literary way to discover a city. At the moment, Storytude is focussed on Germany, in particular Berlin, Hamburg, Frankfurt, Munich and Cologne.
For those of you who speak German:
Website: http://www.storytude.com/
Mobile partner: http://www.mobile-melting.de/