Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

So many migrating birds roost on the bridge, it has a special summer speed limit.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

London's smallest police station is barely the size of a phone booth.

Dedicated to the victims of one of the deadliest hurricanes to strike the United States in recorded history.

A larger than life statue of a steelworker keeps watch over a closed steel mill.

An equine tribute in a charming Southern city that calls itself "The Horse Capital of the World."

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

You must take the A train... to the last active cemetery in Manhattan.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

West Point’s only monument to a woman veteran stands above an empty grave.

An architectural oddity hides in plain sight on this iconic London bridge.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Yo, Adrian!

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

An abandoned relic of the city's failed experiment with below ground transit.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The Scottish Reformation leader's grave was paved over and is now a parking lot.