Whitey Bulger, U.S. Stonehenge

Go inside Boston crime boss Whitey Bulger's hideout, hidden in plain sight in Santa Monica, CA. Visit Centralia, PA, a city destroyed by a 50-year fire -- but not a single house has burned down. Finally, how did a lone 5-foot, 100-pound man build Florida's mysterious Coral Castle, America's Stonehenge?