This is literally the most dreamed-after cabin on AirBnb and it's for good reason. There are three rooms, all connected by rope-bridges and they're about as dreamy as they sound: there's a sitting room, a bedroom (sleeps 2) and a hammock deck. You have to trek inside for the bathroom, but that's not too big of a deal considering you'll be sleeping in the trees. It's nearly impossible to book this spot since it's so popular so, if you can, take advantage and scoop it up.
Rustic treehouse with a bathroom and kitchenette in the trees? Sign. Us. Up. You've got a fire pit, modern-industrial decor, and a deck (ideal for summer nights and sipping drinks). You aren't far from Chattanooga, but there doesn't seem to be much reason to leave the treehouse considering there's a loft and you can comfortably sleep three. Rumor has it you even get a s'mores kit.
Not too far outside of Atlanta and Athens, you're on your way up toward the Tennessee boarder with this one. Located in a historic town near the Soque River shoals, you'll be staying above the old Mill General Store in a post office that was lovingly restored. Sparse in that modern way, it's masculine, but surprisingly stunning. Plus the national and state parks nearby are quite nice for a few good day trips.