The ins and outs, forgotten spaces and disappearing history of America's urban jungles are explored by adventurer Don Wildman. In each hourlong episode, Wildman discovers the true identity of a storied U.S. city and its neighboring towns, investigating off-the-grid areas -- crumbling mines, abandoned factories, buried silos -- as well as common places people walk or drive by every day. His are hands-on, extreme adventures ... the only way Wildman's curiosity can be quenched in finding out how these forbidden, hidden and unseen spaces came to be.