Inhabitat recently covered a prefab concrete house in Ecuador which was completed in 2006.

model: Pentimento House

designer: Jose Maria Sáez and David Barragán

An elegant and contemporary version of the Lincoln Log House, architects...purposefully stacked prefabricated concrete pieces so that spaces were left in-between, allowing air to flow through the home while still maintaining a feeling of separation between indoors and outdoors.

Check out the post for 12 more pictures.

Past coverage: designboom on November 23, 2007 and ArchDaily on May 14, 2008.