In reply to webbo:
Hi mate,
on the main road from Bielefeld (at the junction of Sieker lights and the main tram station) head towards Brackwede. You will go up the hill through the forests and about 2 miles up there is a quarry, some good routes in there.
Failing that, head down the route 2 motorway to Paderborn, get on the B1 towards Hameln and there is a place called the Externsteine. Park in the main car park, walk North straight up through the woods and you will come across a massive boulder with everything ranging from a 3 upwards.
http://www.externstein.de/
DO NOT!! climb on the externsteine rocks in the pictures, it will not go down well, shame though!
Have a grand time and if you get the chance, go into the town centre and the Jahnplatz. It is the main junction in town and on Saturdays the massive sports shop called Sportscheck, lets you climb on their quite big wall on the side of the shop:
http://www.kletterwaende.info/bielefeld.html
Love Bielefeld, great city, good memories.
Hope this helps,
Den