Guided by a 17th-century Jesuit’s tip, researchers uncover an Inca tunnel network beneath Cusco
Jerusalem Post
The extensive underground passages stretch over 1,750 meters and connect several significant sites, including the Temple of the Sun (Coricancha) and the fortress of Sacsayhuamán.
https://www.jpost.com/archaeology/archaeology-around-the-world/article-837603