TreeTents :Love camping, but hate the creepy crawlies that manage to sneak in while you set up your tent? Worry no more; tree tents are here. These geeky structures even come w/ a built-in viewing window. They're a steel frame wrapped in canvas that measure 13' tall and 9" diameter, can Comfortably fit 2 adults 2 children. Unfortunately, you can't buy these... yet, but you can rent one at Hertshoorn Park in the Netherlands.