Cities of the Underworld: Barbarian's Lair

From the swords of barbarian hordes to the guns of the Spanish Empire, Europe's darkest days lasted 1,000 years. After the fall of the Roman Empire, Europe was plunged into chaos for centuries, with mass bloodshed, rampant disease, and vicious carnage regularly raging through the streets. But below them, another world was being carved out to keep the people alive...and keep enemies on their toes. From the immense quarries of a secret society to Templar torture chambers and the tunnels of medieval "ghost knights," we're tracking down the darkest secrets of the Dark Continent, buried deep below Europe's streets.