London Mithraeum | Bloomberg SPACE

You are walking toward the London Mithraeum, a site that rests seven meters beneath the modern streets of the City of London. It marks the exact location of a Roman temple dedicated to the god Mithras, which was built around the middle of the third century. The temple sits on the banks of the subterranean River Walbrook, a stream that served as a primary source of fresh water for the early Roman settlement of Londinium.