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

Pop culture has helped to keep this iconic British building from being destroyed.

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

A Roman spa buried deep beneath the City of London.

Rebuilt remains of a temple to Roman god Mithras.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This sprawling bookstore spans four floors and has more than a million books in stock.

This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Standing guard on top of an old, vacant ice cream shop.

The world’s largest Masonic temple was saved by the White Stripes.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

This feline raises a friendly paw at drivers barreling toward the freeway.

The “Grand Canyon of Maine” is a three-mile gorge full of striking geological features.

If a visit to this farmhouse feels as if you are stepping into an artistic masterpiece, you’d be right.

The debris forms a solemn memorial to those who died in a 1963 accident.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

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

After giving up Michelin glamour for his Amish faith, one chef now makes stellar sausages in a small, off-the-grid shop.

This Maine bridge may be the last wire-supported bridge of its type in the world.

This 19th century granite fortification is one of the most well preserved forts in New England.

This uninhabited island in Maine is home to various works of art left by visitors over the years.

New England's tallest light house stands on an island with a history of cannibalism and death.