In the central part of Utah is a canyon that's been called the "longest art gallery in the world." It's Nine Mile Canyon, and it's much more than nine miles long. If you go, take a truck or a car you don't care much about, 'cause it's dirt road.
It's a canyon full of Anasazi and Fremont petroglyphs. They're right there, by the road, where you can see them from your car or hike twenty or thirty yards up to them.
They are mysterious, eerie, beautiful, and fragile. So, if you go, step lightly. Here are some photos of the petroglyphs.