You'll mainly find small flat obstacles here, but also a semi-drivable 9 stair and a very narrow 11…read morestair. The cool thing about this spot is that it's weather free and that you never get sent away.
The only annoying thing is that there's cars driving around everywhere. Still, you can have some fun here with a little creative thinking.
Bonus: The next-door train station (Dammtor) has a McDonalds for energy supplies ;)