Earthship. Source: www.buildingtomorrow.dk
Cob Building. Source: http://greenstone-design.co.uk/
Cob Building. Source: Goatlings.co.uk
Photo by James Horecka. https://www.flickr.com/photos/18794861@N00/sets/72157621946948481/
Source: http://www.bottlehouses.com/
Casa de Botellas. Photo by Alfredo Santa Cruz. Source: http://www.planet-mag.com/2010/architecture/carly-miller/la-casa-de-botellas/
I-Beam “Ikea style” Pallet House. Source: http://www.tealcheese.com/2014/08/16/diy-saturday-6-i-beam-ikea-style-pallet-house/
Pallet Haus. Source: http://www.palettenhaus.com/
Source: http://treehouser.wordpress.com/2010/09/14/just-when-you-think-youve-seen-it-all-part-1/e12b5f439538d61e6ce50eeb2dd1/
Balmoral Water Reservoir, by Conrad Gargett Riddel. Source: http://www.conradgargett.com.au/project/balmoral-water-reservoir/