Subterranean sanctuaries are found in no fewer than 27 countries around the world, but today most deep-earth domains are less about refuge and more about retail and railways. That is not the case with a underground system that’s been uncovered in what is now Turkey, which archeologists believe Cappadocian settlers used to avoid chaos above ground thousands of years ago.
Where does this discovery fit among the globe’s other underground cities? For one thing, it may turn out to be the largest. Watch the video above for a quick survey on dwellings down below and incredible scans that survey the newly discovered hideaway in Turkey.