This was the coolest unusual lodging I've ever stayed at on a bike trip, the Blue Nose fire lookout near Shoup ID. Not a caboose but the same cozy feel and this one was free! Here's an artistic exterior photo of Blue Nose. Not mine and probably copyrighted so I'll just post the link ...
https://piasano.files.wordpress.com/...enosetower.jpg
My interior and observation deck snapshots ...
