An abandoned stretch of highway, deteriorating next to the operational one.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

The grave of Mary Nasson is shrouded by witchy legends.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

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

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A faded sign from the 1920s remembers Baltimore's resistance toward banning alcohol.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

World War II bunker still standing on the New Jersey beach.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.