The trials and tribulations of marking Poe's grave.

This three-story Victorian mansion is now home to the National Park Service’s Historic Preservation Training Center headquarters.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This plaque in one of London's oldest public hospitals commemorates the first meeting of two of Britain's most famous literary heroes: Sherlock Holmes and Dr. Watson.

People escaping slavery may have hidden inside a corpse vault.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol