Archaeologists discover passageways in 3,000-year-old Peruvian temple
Located 3,200 meters above sea level, at least 35 underground passageways have been found over the years of excavations.
El Castillo, part of the Chavín de Huantar ruins(photo credit: MARTIN ST-AMANT (S23678)/CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)/VIA WIKIMEDIA)ByREUTERS
