Theres a cool one in Swindon, know as 'The Magic Roundabout' (I think because the designer had been at the mushrooms that day)
Anyway, its a collection of them, all together.. meaning that the one in the middle you have to go round 'the wrong way'..
If you every want to see a confused cager, thats the place for it!
I'll see if I can find a googlemaps link.