Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

The only place in America where anyone who wants can shovel coal aboard an antique train.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

An acoustic anomaly with a mysterious cause.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This London plaque marks the spot where David Bowie's famous alien made his debut.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

Ruins of a German Castle on top of a towering stone pillar.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

New Brunswick's tallest mountain is the highest point in all the Maritimes.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Hear the quietest sound from across the dome.

It houses the remains of a 17th-century version of the Titanic.

Final resting place of Antarctic explorer Ernest Shackleton.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.