This is the stuff of fantasy: exploring secret chambers and forbidden passages beneath city streets, unlocking mysteries of the past and discovering forgotten relics! In metropolises around the world today, skyscrapers loom overhead, traffic blares and vendors hawk their wares. But below hide city upon city, each with its fascinating and unknown history. With infectious enthusiasm and runaway curiosity, and aided by instructive computer animations and maps, genial host Don Wildman continues to explore these layers often hundreds of feet down to once again transport you underground and back in time. Check your batteries, it's dark down there!