In the late 19th century, Seattle had a serious problem with sewage and drainage. To fix this, the city decided to raise its streets, creating a network of underground tunnels and passageways beneath the city. However, these tunnels eventually became a haven for criminals, bootleggers, and rats, and were eventually abandoned. In this podcast, we explore the history of Seattle's underground underground, how it became infested with criminals and rats, and what it looks like today.