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

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

Between Missoula and Spokane, a family-owned travel center has an unusual museum in the back.

High in the Rockies the third largest statue in the U.S. opens her welcoming arms, and lights up the night sky.

The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

New fungal and bacterial species call this deadly lake home.

This amazingly preserved Gold Rush town is a historian's dream.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Take a monster truck tour around an ostrich farm in the middle of the desert.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A reproduction of earth's many biomes.

These curious caverns have been home to mushrooms, gangsters, and disco.

A hidden oasis in the heart of Minneapolis is also an Important Bird Area.

This statue of Olympic hockey coach Herb Brooks immortalizes one of the greatest moments in American sports history.

This double-arched masonry highway bridge is the only structure of its kind in Minnesota.

Built in 1931, this small passageway is believed to be the first modern skyway.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

This old residential building was once the largest flour mill in the world.

Inside this museum resides a boot fit for a giant.

This water tower has been a staple of the Rochester skyline since 1931.