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

Olfactory delights in San Francisco's Botanical Gardens.

A huge musical instrument played by the ocean.

The second tallest railway trestle bridge in America.

Thomas Dambo's troll sculpture wears a crown with birdhouses on his head.

A massive environmental project transformed this former smelter into a beautiful park.

This municipal sundial has been keeping time along Tacoma's Commencement Bay since 1978.

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

The highest point in Washington state is a volcano covered in glaciers.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

100-year-old shipwreck you can walk up to at low tide.

A Roman-style column in Oregon hides a spiral staircase inside.

A massive sea stack famous for its appearance in The Goonies.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

Not-so-fearsome tiny trolls live under this wooden train trestle in Portland.

A beautiful 62-acre Catholic shrine and botanical garden.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

Portlandia is the second-largest copper repoussé statue in the United States.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

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

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.