This Japanese eco apartment complex is literally one with the earth
The Roving from 84 Lumber's line of tiny homes
A Straw Bale House Is Eco Friendly And Cost-Effective | DesignRulz
Monolithic Dome Homes
Water Nest 100: An Eco-Friendly, Solar-Powered Home Made With Near 100% Recycled Materials - See more at: http://www.the-open-mind.com/water-nest-100-an-eco-friendly-solar-powered-home-made-with-near-100-recycled-materials
Love this underground home, just swap kitchen area to be on the window wall and it's perfect!