These man-made caves were carved in sandstone that is soft enough to excavate with hand tools, but sturdy enough to provide homes for centuries.
Berber Cave Homes, Tunisia
naturalhomes.org
The homes in the deserts of Tunisia are cool during the day and warm at night.
from Home Services Blog http://www.facebook.com/naturalhomes/posts/790118684374531
from Tumblr http://msalexandrakpierson.tumblr.com/post/112339741303
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