A wooden street sign is the last remnant of this 400-year-old alleyway.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

This giant subway sculpture celebrates the fruit that inspired the theory of gravity.

Enormous ants wielding giant pine needles guard a Stockholm real estate company's office.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

There are hidden patterns on the subway seats of some Stockholm metro cars.

A temporary art piece to celebrate LGBTQ Pride is now a permanent part of Stockholm's traffic landscape.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This homeless brass fox tugs at your heartstrings from the foot of a Stockholm bridge.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

This museum on San Juan Island is dedicated to the conservation of orca pods.

Memorial commemorating the deadliest landslide in U.S. history.

Defaced since the early 80s, this bridge has become local icon to the metalheads and residents of the city.

In addition to what was once the world’s largest single-loom carpet, this charming space contains a pair of unique flags in American history.

This historic bridge connects Whidbey Island to Fidalgo Island across whirlpool-filled waters.

This 50-ton ship on Orcas Island has never seen the ocean.

The largest police museum in the western United States displays the evolution of crime-fighting Seattle.

A brewery warehouse which doubles as a circus bigtop.

Founded in 1961, this comic shop is said to be the oldest in the world.