In Salem, West Virginia, sits an old railroad tunnel called Flinderation Tunnel. It's location is not far from the Trans-Allegheny Lunatic Asylum. The structure itself is about 1,000 ft in length and was built in the 1860s. There are many alleged reasons for its weight in paranormal activity.
One tragedy began with three men working on the tracks inside the tunnel in the 1800s or early 1900s. A train approached them at high speeds and very little warning. One man escaped to a cubbyhole unscathed. Another was supposedly cut in half by the train. And a third was dragged about 75 feet trapped under the train, causing it to derail. He didn't survive.
Another story associated with Flinderation, deals with the infamous KKK. Supposedly, in the mid 1900s, they brought many of their victims to the tunnel. It became a regular lynching spot for them. It was officially "shut down" and the tracks were torn up in the 1990s. Today, it's a part of the North Bend rail trail.
One last story involves the cemetery located on top of the tunnel. On Travel Channel's Ghost Stories, a claim was made that some of the coffins fell through the roof of the tunnel, causing it to be patched on more than one occasion. There were some insinuations that a body may have become caught between the repaired tunnel roof and the cemetery after their coffin fell through. Can't say for sure if there is any truth to it.
The reason for shutting down the tunnel involve people hearing phantom train whistles and seeing the ghost train that continues to "travel" through it. Other reports include unknown lights, phantom mists or fog, footsteps, orbs, growling, screeching,sobbing, sound of metal scraping against metal, voices and various apparitions including that of a little boy and girl who are also often heard talking and giggling.