More to explore:
Underground House Concept : Curvy : The Sketchbox | An underground home project
27 Absolutely Stunning Underground Homes. I want to live in a cave.
an amazing interior shot of the "rainbow glass" underground home - with a unique concrete path and indoor plantlife
A seaside underground home with the best skylight example I can remember.. Bonus points for the hanging bed..
a terradome form underground home - with a beautiful stone facade and floor-to-ceiling glass windows on the front
An ultra-modern, unusual underground home in the Sala Silver Mine (sweden)
A palatial underground home in paraguay
A very angular, modernist underground home built using the Terra-Dome form system
Beckham Creek Cave Lodge, Parthenon, Arkansas | 27 Absolutely Stunning Underground Homes
Intricate modular earthen-roof home, simply amazing