Explore the ancient site of Ollantaytambo in Peru’s Sacred Valley, one of the largest Inca and pre-Inca megalithic complexes.

Karen Klotz, Michael Sanio, ASCE director of International Alliances and ASCE President-Elect Wayne Klotz peer through a reconstructed doorway in the Incan citadel of Machu Picchu in Southern Peru.

Beneath the stone-paved streets of Cusco, a city layered with centuries of Andean and colonial history, researchers have located what may be the most significant Inca discovery in recent years. For ...

I saw the evidence of Inca engineering skill in the tour that took me to Machu Picchu.Only in hindsight, when I was preparing to write about it, did I begin to fully appreciate the Inca Empire's ...