In 1957, a Plymouth Belvedere was burried in Tulsa for a constest.
The car was seen as a way to show 21st century citizens a suitable representation of 1957.
50 years later the contest is over... but things didn't go as planned [fr] :p
Luckily the Egyptians where more skilled at burring things ;) Otherwise we would not even know what a mummy is!
More info about the whole story.