A colorful architectural gem in Seattle's uniquely modern Central Library.

Stroll through a wonderland of stupendous moss-covered trees.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

An emporium for the weird, creepy, rare, and just plain gross.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

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

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Perfume museum and library.

Banksy gives themself artistic license with this piece of London street art.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

This historic club for wayward boys has shaped some of the biggest names in music almost as much as they have shaped it.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

This crumbling folly looks like an enchanted left over from Middle Earth.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.