In this tree house special, George rediscovers some of the best tiny builds to be found up in the treetops across the world. In Tuscany, George visits a romantic treehouse. There's a tree hotel in Sweden shaped like a UFO. The show also features a tree house designed like a mirrored cube. And there's a look back at the epic tree house George and master carpenter Will Hardie built together in Kielder Forest Park.