In Nebraska, United States, you can also find Carhenge, photographed here by Whisperawish. There are apparently other Carhenges, including one made entirely of Cadillacs, but this one in Nebraska is the classic:
Here's another view of Carhenge, by Alachance.
And then there's Boathenge, in Missouri, United States. In this photo by Debunix, you can see that Boathenge is clearly influenced by Carhenge — the boats are half-buried in the ground.
Of course, in San Francisco, California, we have Doorhenge, as you can see in this gorgeous shot by Grimages.