Berlin + Brandenburg Mostly Sport climbing424 routes in region
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Despite the complete absence of natural rock formations, Berlin still offers some remedies for the vertically-addicted: artificial climbing walls, gyms, chiselled bunkers and semi-legal buildering. With more than 100 places to climb, you should be able to get pumped.
A nice overview of all locations can be found at http://www.klettern-in-berlin.de (in German).
An excellent guidebook is "Dickes B": http://www.geoquest-verlag.de/?q=node/77
Check out what is happening in Berlin + Brandenburg.