The local newspaper Genral-Anzeiger in Bonn oranizes a hiking day every year. Participants have a choice of hiking the "family route", or 10km, 20km or even 30km. Several thousand people participate usually, and for this year we have created accompanying missions for Tidy City - as the hiking tour starts on our campus. There is even a price for the best player!
If you are near Bonn, this Sunday (September 2nd) is a great opportunity to explore the marvellous surroundings - and play some Tidy City.
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Links:
[1] http://www.general-anzeiger-bonn.de/freizeit/ga-wandertag/berichte/Raetselspiel-auf-Handy-fuer-Wanderer-article840308.html
[2] http://www.addtoany.com/share_save?linkurl=http://totem-project.fit.fraunhofer.de/?q=node/163&linkname=Wandertag