At the Venice Architecture Biennale 2010 Lisbon firm Aires Mateus Architects are exhibiting these houses with sandy floors called Casa Areia. The project comprises seaside accommodation made of wooden frames covered in natural fibres. Sand covers the floor in the kitchen and living space, connecting them to the beach and landscape outside.
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Here in coastal New England, we refer to this style as "what the inside of your house looks like when the tide recedes". 