This time he focuses on how nature and architecture can work harmoniously together in the glorious world of cabins in the wild. There's a mountain-top ski lodge in Italy only accessible by helicopter; a hobbit-inspired cob house in Oxfordshire built for only ú150; and a concrete dome-home built under a man-made hill in a Texan hurricane valley. And George reflects on his own wilderness cabin that he built in the Sussex woodlands.

George Clarke looks back across five series of Amazing Spaces and some of the amazing houseboats people have built for the Great British waterways. There's a seaplane from World War Two transformed into a bachelor pad; a 1960s pleasure cruiser refurbished as a marital home; and a hand built custom designed writers retreat created in the shape of an egg. George also looks further afield to an amazing holiday apartment on a lake in Germany and a Danish waterside home kept afloat by polystyrene and water bottles.