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

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

Five varieties of trees with custom-designed grates around the trunk are planted along the route of the Seattle Transit Tunnel.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

An enclosed rotunda at the Henry Art Gallery in which viewers can look up and see the uninterrupted sky.

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

A stealthy Apache hideaway that became the haunting site of a mass grave.

See massive fossils that are over 200 million years old in northeastern Arizona.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This Puget Sound military post has a long, turbulent history as a gateway to the Pacific.

A curious collection of miniatures in a quiet corner of the Chicago Children's Museum.

Illegal drag racing two stories beneath Chicago’s streets.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

First planned industrial community in the United States.

Browse through roughly 130,000 titles in the world's largest independent video rental store.

A sliver of nostalgia in Seattle's Viretta Park.

Leave a button on the jacket of this iconic Seattle clown.

Seattle's super-sized cowboy apparel once belonged to a themed gas station that wrangled in herds of tourists.

Craft liquors concocted in an old Seattle warehouse.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

This ancient oak tree plays matchmaker for singles willing to branch out from the usual dating scene.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.