2,000-year-old Roman gold mine found buried beneath a Spanish mountain reveals how ancient engineers moved millions of tonnes of earth | World News
For decades, archaeologists suspected that a strange landscape hidden in the Spanish Pyrenees was more than a product of nature. Deep trenches, artificial ravines and enormous excavated areas hinted at a forgotten human story buried beneath the mountains. Now, researchers have confirmed that the site, known as Guilleteres d’All in northeastern Spain, was once a…