Or, Take That, Future Archeologists!
I can think of no better use of resources than to mess with the people of the future.
From the Believer:
This explains menhirs and moai better than anything else, I think; though I may be the only historian who attributes major monuments to whimsy and irony. h/t
Image Cite: flow14, “Carhenge @ Sunset,” Flickr, CC License