This snug medieval lane is one of the narrowest streets in the world.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

Home to three historic ships from the age of Vikings.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

This one-room museum is dedicated to Norwegian history and jokes.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

A favorite with sightseers and locals alike, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

The tale of a strong-willed woman who stood her ground when the commercial world came rumbling in.

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

A wall of chewing gum moonlights as collective art.

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

An eerie former warehouse turned cistern turned movie set.

A "Minnesota-style" pizza parlor in the Scandinavian heart of Seattle.

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

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

A piece of Seattle’s historic Chinatown preserved inside a modern museum.

A fountain standing as a testament to a doomed alliance.

A marvel of Byzantine engineering under the streets of Istanbul.