This is the Medicine Wheel, ten thousand feet up in the Big Horn Mountains of Wyoming. When asked about it early in the 20th Century, holy men of the northern Rockies and the great plains "would not say what it was for." Modern speculation (rather too prosaic, it seems to me) is that it was a kind of celestial calendar, an observatory where stone alignments with the stars and the Sun and the Moon marked the changing seasons. I do not believe this is so.

Nevertheless, National Forest Service campsites a few miles east of the Wheel are as close to the stars as you can get without being on NASA's flight roll. Dress warmly.

Another esoteric relic on the high plains...