DirtFarmer wrote:
Somehow I doubt that carhenge will last as long as stonehenge has.
I used to live in Pittsburgh, PA, back when it was a steel producing town. Pittsburgh gets snow. Pittsburgh is hilly. Pittsburgh did not own snow plows. They used salt trucks. Probably on the theory that when the salt rusts out your car you will buy a new one, thereby keeping the steel industry going.
You're probably right. Rocks last longer than steel.