One of my go-to routes in the Vienna area. It starts off at Exelberg (Exel Mountain) next to Vienna and goes through the beautiful roads to Katzelsdorf. The second half, to the south of Pressbaum, goes through the forested highlands of the Vienna Woods.
The route consists to a large part of inclines and declines and many (sharp) turns. It does however contain a few rather straight sections which can be done with higher speeds.