General Motors’ Pontiac Deluxe Six sedan is the only car constructed from Plexiglas. The 1939 Pontiac was was made to be the main attraction at the New York World’s Fair primarily to show off the engineering wonders of an automobile innards.

In the years following its display in New York, the “Ghost Car” made its way to the Smithsonian Institution in Washington, D.C. where it sat for eight years before disappearing into the garages of private collectors in the ’80s.