This massive library holds what was once the largest book collection in the world.

The narrowest street in Paris.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

This bridge was constructed from the rubble of the infamous Bastille.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

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

The approximate spot where the last Grand Master of the Knights Templar was put to death.

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

This historic Victorian hotel has a scandalous history of affairs and murder.

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

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

The highest point in Washington state is a volcano covered in glaciers.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The small town of Poulsbo in Washington state is the next best thing to the Kingdom of Norway.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A wall of chewing gum moonlights as collective art.

This working class sculpture pounds his hammer all the livelong day.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.