The Outpost in South Africa = No walls
This uniquely designed hotel is situated in South Africa on a hilltop in an untouched wilderness. Only 24 guests for this paradise of a hotel. Made from steel , canvas and aluminum and surprisingly open and unaffected. So basically you are outside when you shower and sleep but with modern ammenities and a few floors up. Its called The Outpost, how appropriate. Not so sure about the sleeping outside though, how about snakes?