There's weird stuff in our country. What the hell is that 300ft tower doing out there in the middle of nowhere? There are no support buildings, and I'm not really sure there are any roads. If there was a big thorn thicket around the base, I'd have thought it was where Rapunzel had been spending her time combing her hair, but there wasn't even that.

New Info: One of my boating friends solved the mystery. That is the Anaconda Company's Smelter Stack. 585ft tall, 75ft wide at the bottom. It is now a Montana State Park.