George Clarke returns for a new series, as he follows more fantastic, unlikely and amazing builds, and, in an Amazing Spaces first, shines a light on three of the best builds he's always wanted to see; from tree houses and budget builds to unique and eco creations. George visits all manner of brilliant self-builders, meets Amazing Spaces' youngest ever contributors, and travels to Portugal, where he visits stunning modern houses and ancient boulder homes. In this episode, George meets two young brothers and Amazing Spaces' youngest-ever contributors, who are turning a battered bus into an ice cream van. George also sees how an oil rig lifeboat is turned into a floating home, cleverly financed by social media marketing and sponsorship, and visits a stunning Portuguese beach home inspired by local fishermen's reed huts. And George celebrates three utterly eccentric builds: a 20-foot-deep cave folly at the bottom of a suburban garden, a historic recreation of a World War I trench that you can holiday in, and a 1960s house where one exterior wall has been removed and replaced with a vintage train carriage!