Uncategorized Derinkuyu Underground City, the World’s Deepest Subterranean Metropolis Posted on October 11, 2017 by johnbarleycorn12 Source: Derinkuyu Underground City, the World’s Deepest Subterranean Metropolis Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading...
John Barleycorn 