Penthouse orgies fueled by pill-pushing bellhops. A drug den stocked with sex slaves. Hidden homeless camps under the casinos. The real Sin City is even seedier than you imagined.

Two decades after NYC sought to relocate its infamous tunnel-dwelling denizens, a years-long investigation reveals a few hardy souls still toiling and thriving beneath the city.

Years of fielding constant calls from strangers in harrowing situations left one first responder stricken with PTSD, attempting suicide and wondering why there’s no safety net...

Fifty years ago, this prosperous Pennsylvania coal town was ripped apart by a devastating subterranean mine fire. Today, the flames still burn in Centralia.