Just finished, a 3D enclosed maze..... 3 levels, 20m x 20m footprint.
Can be found at Fourmile 115, 198, 144, entry only L$10 for 2 hours!
Are you up to the challenge?
Feedback gratefully received (use entry on SL Exchange where this maze can also be purchased for a reasonable fee!)
http://slexchange.com/modules.php?name=Marketplace&file=item&ItemID=240625
Cheers.