An around-the-world and back-in-time adventure exploring curious worlds hidden beneath our feet, from underground burrows to ancient cities and shopping malls This stunning lift-the-flap book takes readers on a journey around the globe and deep underground. There they'll find amazing hidden worlds teeming with life — from prairie-dog towns and ant cities to opal mines and treasure-filled tombs. Each spread is bursting with details and surprises to discover in the cutaway artwork and under the flaps. With so much to see and explore, this is a perfect gift for young adventurers.