In this compilation series, George Clarke looks back over some of his favourite projects from across five series of Amazing Spaces, starting with George Clarke's Amazing Treehouses. There's the farmer building a caravan-inspired treehouse in the highlands of Scotland; a mirror-clad cube in Sweden; and a UFO construction nestled amongst the branches. There is also a trip to Tuscany and George's own star gazing treehouse in Kielder National Park, Northumberland.