A whimsical village of unique treehouses resides in a Washington forest.

A comprehensive collection of bonsai set in a beautiful campus.

This three-story antique market and curiosity emporium claims to be "the largest singly owned antique shop in the Pacific Northwest."

This contemporary art museum is filled with other, smaller museums, which feature work from artists primarily in the Pacific Northwest.

An eclectic restaurant serving from and to the nearby Chittenden Locks.

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

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

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

This historic building provides a powerful glimpse into the lives of Japanese Americans forced to relocate during World War II.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

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

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

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

This former coal gasification plant found a curious second life as a popular public park.

A (slightly) grownup take on the classic retro arcade.

A house filled to the brim with oddities and curiosities.

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

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

This huge metal monument is slowly being stripped to its concrete skeleton.

Legend has it fairies gathered at the site of this medieval castle.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Yugoslavia's biggest underground airport lies in ruins.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

An ethereal glowing blue ocean cave in Croatia.