That was a nice walk through a nature reserve, but unfortunately it was not finished with a find. I missed to find WP2 since I did not understand the hint. Well, with some deduction and the hint for WP3, I found the coordinates for the final location. However, there I was not successful. Because of the stinging-nettle, I had a hard time to search all possible places. Well, and then I ran out of time. Too bad. Nevertheless, it was a nice walk.
Thanks to Barantoo for the cache - fogg