Ziel Nurburgring
Lol, that place is to funny. I used to go there about 10 years ago. Driv up at dusk, climb the wall by the tree and have a look around. sh*t scary as it just looks abondoned like it 28 days later or something.
Loads of urban myths about there being secret experiments and stuff, but wandering around the wards make you sh*t it enough.
Maybe a CS most haunted episode to come in the summer?