A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

A half-size replica of the World Trade Center towers above Tulsa.

This massive Art Deco-inspired mural was the world's largest augmented reality artwork at the time of its completion.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

A clone of a cloned tree that was so important it allegedly had its own guards.

One of New Zealand’s few castles boasts beautiful gardens, grand architecture, and a history filled with family drama.

New Zealand's epic shrine to all things puzzling.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

A surreal statue honoring Prague's favorite literary son.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The celebrated eyesore created by starry-eyed sweethearts.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

This demon atop the Notre-Dame de Paris looks utterly bored.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This former luxury resort in Kaua'i is now an abandoned relic.

Hawai'i Volcanoes National Park is home to one of Polynesia’s largest petroglyph fields.