One of the most remarkable aspects of Machu Picchu architecture is the precision with which the stones were cut and fitted together. The Incas used a technique called ashlar masonry by the masons. This technique involved cutting and shaping individual stones to fit together perfectly without the use of mortar.
The Incas also used a dry fitted masonry technique called caninacukpirca (Incan), which allowed them to shape stones to fit into tight crevices and conceal natural outcrops. Masons call it drystack. These people, the Incas and the masons, were separated by thousands of miles and years yet their techniques were basically the same.
wy69
Fascinating info, WY. Thanks.