My Wife arranged a birthday visit for me to the excellent GM Heritage Centre in Sterling Heights Michigan. a while back
The collection of vehicles at the centre is superb, some photos can be seen in the gallery.
All of the famous concept cars such as the Buick Y Job, Buick Le Sabre, Mako Shark, and the various Firebirds.
Most of the GM output of the last century across the various brands are well represented, in either restored or original form.
There is a great neon advertising display, along with a comprehensive engine and transmission displays.