Inside the strtucture of a kancha made by Incas with precision , a mix of perfectly carved stones that fit together that no glue is needed, with wooden logs made of straw for the roof

precision craftsmanship perfectly carved stones seamless fit no glue needed wooden logs straw roof architectural marvel inca ingenuity stone masonry traditional craftsmanship ancient building technique unique architecture structural design thatched roofing inca engineering cultural complexity meticulous stonework peruvian heritage construction method stone carving cultural richness craftsmanship inca culture architectural excellence cultural significance masterful construction stone fitting wooden framework straw roofing ancient design architectural innovation traditional building thatch construction inca craftsmanship building precision stone structure roofing technique architectural detail structural integrity unique building method kancha structure architecture construction indigenous craftmanship cultural heritage