The other side is actually green.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

One of the largest megalithic complexes in England, which local legend holds is a wedding party turned to stone by the Devil.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

A 142-foot-tall Q-tip on Bristol's skyline.

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

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

A former major munitions plant that has been converted into a sprawling art space.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

Once America's tallest structure, now a Baltimore landmark.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The anatomical-pathological collection of a man who changed surgery.

Huge masonic hall in Philadelphia with lavishly themed rooms.

The United States Capitol's former columns still stand.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

The 28-foot granite map plots the locations of 40 theaters in New York City.