I'm not a huge car person, but I am impressed with the Batmobile replication. (Okay, it's the Batmobile from Batman Forever, but at least it wasn't from the one with poor Alicia Silverstone and Chris O'Donnell.) It was designed by Bob Causey and is actually driveable.
More pictures through the link!
Causey also helped build a replica Batmobile from The Dark Knight. Sweet!