These TreeTents were originally designed for a group of activists to hide out in while fighting highway construction through forests. The tests provided them with a comfortable place for them to stay, during their long camping sessions in the trees.
Designed by Dre Wapenaar, the tents are composed of a steel frame wrapped in canvas which create a roomy hardwood sleeping platform. Inside, the tents are 13 feet tall and 9 feet in diameter, with a mattress large enough to accommodate two adults and two children. They're also available to rent at the Hertshoorn campground, Netherlands.