Green Roofs around the World - This is one of Iceland's century fishing stations. It's built using thick dry stone walls with a timber roof under thick insulating layers of turf. This is the maritime museum just outside Bolungarvik.
The Storytelling Roundhouse at the eco-retreat center, Cae Mabon, located in northern Wales. They offer several dwellings (like this thatched roundhouse) for overnight stays, retreats, or to explore the Celtic landscape.
Icelandic turf houses are old-school green with a Viking twist (photos)
Sky Garden House by Guz Architects. Wierd, but I think it would be really nice to inhabit. It's also an interesting application of green roofs/roof gardens to a very modern, otherwise steel and concrete design.