Unna
Unna is a city of around 70 000 inhabitants in the Ruhr Area in Germany. The city is the eastern gateway to the area.
Hitching out
There is no convenient hitchhiking spot on the motorway in Unna itself. Unna borders Dortmund and it is only 20 minutes by train to go there. From there you have good hitching possibilities in all directions. Check the article of Dortmund for detailed information. Another option is to go to Hamm, what might be a good idea if heading to Berlin.