Machu Picchu stands in a seismically active mountain landscape crossed by major fractures. Its tightly fitted, mortarless ...

Above the old Inca capital of Cusco, in the Peruvian Andes, three tiers of zigzagging stone walls climb a hillside in a ...

One man’s decision to rebuild his family’s Oceanfront home after hurricane Katrina has elevated a local builder’s foundation blocks to new heights.