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

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

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

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

This historic hub for labor unions has survived the city's changing landscape.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

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

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

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.

This fully intact Neoclassical-Greek Revival style firehouse operated until 1938.

A watering hole where the options for seating include a bar, patio, or subterranean cave.

A fine mixture of the old and the new topped with an art deco neon spire.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

Granting the right of way to ships over surface traffic since 1917.

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

A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

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

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

City Council meetings still happen in this historic building, impeccably preserved on the inside.