72h Cabin (Sweden)
Smaller than a single bedroom and just larger than the bed itself, 72h Cabin is quite literally a place to sleep in the forest. The buildings were actually created for a study by Karolinska Institutet measuring stress reduction. No surprise, participants who stayed in 72h left with dramatically reduced stress levels. Designed by JeanArch, these itsy-bitsy retreats were made to enhance their natural wooded surroundings and keep you as close to nature as you possibly can be (with a roof over your head). Located on a private, off-the-grid island, the structures are made of timber from the very trees that grow around 72h. A boost from the ground provides warmth, and glass walls and an A-frame roof are perfect for stargazing.