20 minutes away, eh?
I’ll bet there’s a lot of UFO activity in your area, isn’t there?
(Pssst. Help me out here, okay? You see, I’m having this argument with some guy who thinks a bunch of gallant “heros” in shining armor put those stones there -—but we RATIONAL people know it was the aliens, right?)

I’m with you, aliens. Prolly a temporary shelter built by a Vulcan jonesing on his pon farr. Must have heard the Native American chicks were hot.