Chaco?
I spent a night in an Anasazi ruin near Canyon de Chelly under a full spring moon deep in a meandering sandstone canyon.
Yeah, there was an ancient feeling there. Weird 24 hours.
Sitting around a campfire, our shadows playing on the stone wall like it was Plato's cave, the sound of frog croaks bouncing off the canyon walls to the point of being really annoying...
Even without the ruins, that land is mysterious in ways I'll forever fail to describe.