One place where you might not need any formal celebration to mark Halloween is Harpers Ferry National Historical Park. More than a few ghost stories swirl around this West Virginia town.

Snow, possibly more than a foot on the ground, is hampering efforts to find an overdue backpacker who might be in the high country of Kings Canyon National Park.

Ghostly encounters aren't commonplace in the National Park System, but then, they're not unheard of, either, as we'll point out in a series of stories this week. The first is from Voyageurs National Park.

In the years leading up to—and during—World War II, the technology and techniques for "homeland security" were much different than those used today. The recent arrival of a giant naval gun at Golden Gate National Recreation Area will help tell the story of coastal naval defenses during a key period in our nation's history.