Casa do Penedo, Fafe, Portugal, 1974

This ‘House of the Rock’ was created by an engineer who took advantage of the way huge glacial rocks had littered the landscape.

Walls were bridged with rough concrete to create a simple shelter. It now sits in the middle of a wind farm, though ironically remains off-grid.

Image Credit: Photograph by Daria Chuvaeva

Source: Rock classics: the most extraordinary stone buildings on Earth – in pictures | Art and design | The Guardian