The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

A former military outpost of Ivan the Terrible, the 16th-century church contains some of the rarest examples of Eastern Orthodox mural paintings.

A pink and gray pair of pachyderms advertise a fireworks shop.

At the center of this cemetery stands a 2,000-year-old burial mound of the Adena culture.

"X" marks the spot of an echo chamber in the middle of a plaza.

This twisty sign depicts the chain's first logo.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

An eerie smiling woman looms above the granite tombstones.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

This steamer is known as "The ship that built Cleveland."

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Metal dinosaurs lurk in a sculpture garden on the outskirts of a popular resort town.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A toxic ghost town sitting atop a massive coal fire.

What is it about mushrooms that makes people wish they lived inside of them?

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.