An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

The four tall pillars once marked the entrance of the historic Seattle church that fought for women's suffrage and civil rights.

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

This grand old 80-foot sequoia towers above the buildings in the city’s retail center.

In the absence of a Chinese-language newspaper, for years the community posted daily updates on this simple bulletin board.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

This monument remembers the first Japanese Americans forcibly relocated during World War II.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

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

This Cold War missile launch site has been abandoned for 40 years.

Protected from the elements, these Native American rock paintings have survived approximately 250 years.

Walking by this fence is like strolling along a portal to various fictional worlds.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

A community gathering place that once housed half-ton tanks and the World's Fair.

A nearly abandoned 19th-century town on the Palouse.

The century-old remains of an abandoned farm town in eastern Washington.

This former mining hub holds a surprising abundance of undisturbed relics from the Old West.

This dilapidated ship carcass covered in trees is a striking sight.

The statue honors an adventurous seafaring cat.

A Seattle oddities shop brimming with Victorian-era gems and antique curio.

In this subterranean brick arcade, a small shop continues the ancient practice of bookbinding.

This working class sculpture pounds his hammer all the livelong day.

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

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.