A Roman-style column in Oregon hides a spiral staircase inside.

The flock of plastic poultry is an ode to the classic comedy staple.

A massive sea stack famous for its appearance in The Goonies.

A giant Troll lurks under one of Seattle's oldest bridges.

A wall of chewing gum moonlights as collective art.

The taxidermied remains of a once-great parrot.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

The narrowest street in Paris.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.