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

A colorful architectural gem in Seattle's uniquely modern Central Library.

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

The Denny Substation has been called "the coolest substation in the world" and sits in a densely populated Seattle neighborhood.

The longest and widest floating bridge in the world.

A nondescript Seattle restaurant inherited a piece of European history.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A dazzling display of red rocks weathered into spires and hoodoos.

The fifth-longest natural arch in the world, and the longest outside China.

A stunning landscape of bunkers that once stored chemical weapons.

This natural marble cave is one of only five national monuments in Oregon.

There's something big lurking beneath the surface of this tiny Oregon park.

Home to the only outdoor municipal elevator in the United States.

Home of Howard Hughes' Spruce Goose.

No two pieces are exactly the same at Portland's hippo-themed hardware store.

Tens of thousands of tiny birds swarm into one school chimney every fall.

Is this the most Portland place ever?

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.

A collection of colorful dinosaurs hidden in an actual rainforest.

Only known mainland rookery of the threatened Stellar sea lion.

A glimpse into the "Logging Capital of the World" at a time when there was far more forest and far less machinery.

Orcas on display and in the water.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.