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

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

"All Mountains - All The Time."

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

This iconic science fiction house still looks like something from the future.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A sculpture of a salmon swimming through a brick building.

10,000 flowered plants bloom in the City of Roses.

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

The platform atop this verdant volcano was built with the help of a royal elephant.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

The first park built over a freeway is a brutalist masterwork.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

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

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

In a small Japanese garden off a busy Denver street, a memorial to a brave, principled politician.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

It's easy to forget what century it is as you wander this rustic homestead.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

This museum offers an actual time machine back through Colorado's past.

A downtown park built on top of unclaimed graves.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.