I would gladly hike up a hill everyday if it meant that I was going home to 'Stay Grounded.' 'Stay Grounded' is a concept home from Materica Studio that was built into a hill to provide private, eco-friendly living.
'Stay Grounded' would have grass and solar panels on the roof to provide green energy. The house itself wouldn't be visible unless you were directly above it. The houses are small enough that many of them could be placed onto one hillside, thus creating an eco-housing community.
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Real Life Hobbit Havens