There's a fantastic looking indoor astro track here in Belgium.
It's located in Charleroi, called black country arena.
Check out the following vid from this year's EIR, won by Tom Cockerill.
http://www.youtube.com/watch?v=YCLPKsyjYRI
And a report for the 2nd round of European Offroad Series:
http://www.oople.com/rc/photos/eos-rd2-charleroi/