This freshwater spring fills with 10,000 gallons of water per minute.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

A mysterious light of unknown origin on the backroads of Missouri.

It reportedly took three years to sort through all the objects in this eclectic lifelong collection.

Nature's biggest mammal swims in landlocked Oklahoma.

One of the best examples of Art Deco architecture in the United States.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A carved bench marks the Scottish cave that inspired the classic adventure novel "Treasure Island."

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

An ornate "graveyard" for some of the country's forlorn building relics.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

Every birth, death, and marriage is recorded in these color-coded leather-bound books.

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

This ordinary street was made infamous by a legendary visit from the devil.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Scotland's oldest purpose-built concert hall houses an incredible collection of ornate, centuries-old keyboards.

It's a mystery how these curious columns wound up in an Edinburgh suburb.