He claimed to have seen rocks burn, bandits command sandstorms, lions tamed with a look, and sorcerers charm sharks while divers gathered pearls on the ocean floor. Marco Polo shook Europe with descriptions of the world he’d seen on his epic journey to the court of Kublai Khan. But was Marco Polo the world’s most accomplished explorer? Had he really seen the “Roof of the World” in Central Asia, and the “City of Heaven” in far-off China? Or was merely he a impostor with an inventive mind?