Couple's personal collection of pinball machines turned public pinball museum.

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

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

This natural spring is the winter home to the largest gathering of manatees in the world.

This Victorian mansion is part heritage museum, part architectural oddity, and part ghost story.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Meet manatees face-to-face at this zoo for native species.

The mounds on this coastal archaeological site reveal the history of the land’s first inhabitants.

Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

One of the best views of the city is tucked away at the top of a water tower.

A large AIDS Memorial Pathway art installation provides a moment for quiet contemplation in this public park.

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.

Founded in 1961, this comic shop is said to be the oldest in the world.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

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

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

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

A walk through the historic city center, under the streets of Seattle.

A bike being "eaten" by a tree is the real Vashon legend behind popular children's book, "Red Ranger Came Calling."

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

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

The longest and widest floating bridge in the world.