Join our voyeuristic voyage into a hidden world of secret passages.                                                                                    

Origins and builders of mysterious rock structures remain in dispute.                                                                                  

Joseph "Bunco" Kelly was the kingpin of the secret Shanghai Underground.                                                                               

Join us as we explore one man's beautiful underground labyrinth.                                                                                       

Don uses brand new mapping technology to expose the dark and deadly uncharted spaces beneath American cities.                                          

100 years ago Portland, Oregon was America's Sodom, a city full of vice, considered the most dangerous port in the world. It was a place where you could get drugs or booze or wake up trapped in a cell beneath the earth. Expanses of underground tunnels enabled slave traders, opium runners, and speakeasies to flourish. Join host Don Wildman as he ventures beneath modern Portland into the nefarious world of fight clubs, slave tunnels, and gambling dens.

As the Cold War reached its boiling point, the US began to make plans to protect the country and the president. Elaborate defense preparations were made in the event of nuclear war.