This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

The little-known second castle that William the Conqueror built in York.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

This unassuming building produced some of the world's most famous bells.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

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

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

A line of disused military bunkers built to defend against Nazi invasion lies hidden on the outskirts of the city.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

Follow the original medieval paths that wind through this intriguing section of the city.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The turquoise-studded skull of a long-dead Aztec man sits within Mexico City’s Museum of Anthropology.

The walls and streets of the ancient city are peppered with penises.

One of the most controversial statues in Romania is an emperor with no clothes.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.