Calle Loreto

This guide to Calle Loreto in Cusco follows geologist Andy Combey and a team from the University of Grenoble Alpes and Peru's INGEMMET as they read the cracked corner stones of an Inca wall like tree rings. It sets colonial masonry nearby, cracked one way, against the Inca wall in front of you, cracked another, a mismatch that points to two separate earthquakes rather than one. The team spent months cataloguing thousands of fractured and shifted stones across the whole city before settling on that wall in front of you.