Come take a walk on America's dark side. Bloody battles, shady shanghaiing practices, built-over burial grounds, and natural disasters have left behind an unsettled past in towns throughout the country.

See which 10 cities top the ranks among ghost hunters for high concentrations of hauntings. And read on to find out where and how you're most likely to have a run-in with the spirit world not only on Halloween but any time of the year.