I went to koln for 4 days last week and had to notice that the street and natty is amazing for trials I saw a guy on a pure riding by the river too ( if anyone knows him ) There were big ledges , rocks , rail gaps , drop gaps , small ledges , gaps , etc in about a 100m stretch of the river Im seriously thinking of going back there and taking my bike its a must go Josh. Ps . never get a coach around Koln i was sitting at the back with my brother and fire started coming up the back and through the floor we got off just in time ( then it blew up ) Bang