This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

This historic early-20th-century building still boasts some of its original features.

A unique blue and yellow phone booth in America's "Little Sweden."

Massive still life just off the highway in Kansas.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

World's smallest skyscraper, the product of a remarkable con.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Stroll through a wonderland of stupendous moss-covered trees.

Its collection includes a broad array of social, geographic, graphic design, and political history.

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

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

This popular pilgrimage site offers a hole filled with holy healing dirt.

A natural formation that resembles a camel resting in the New Mexico desert.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

A miniature city, once ruled by the Queen of the Netherlands.

The structure has welcomed visitors to this scenic harbor city on Lake Michigan for many decades.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.