That Roundhouse was part of Brithdir Mawr, an intentional community in Wales. It is described as " an ecohome of wood frame, cobwood and recycled window walls, straw-insulated turf roof; with solar power and wind turbine for electricity, compost toilet and reed beds for grey water."
The owners were almost evicted a few years ago, but we wrote in 2008 that they were saved from demolition. Founder Emma Orbach wrote:
It's a milestone in a free society that a minority of people who wish to live simply on the Earth are now being given this opportunity. The villagers are pioneering a new lifestyle.
More in TreeHugger: Secret Green Community Saved from Demolition