What remains of the summer palace of King Kamehameha III.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

One kilometer of thick brass rod laid out before your eyes.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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

An effigy of Vancouver's Gastown neighorhood's namesake.

The colorful, smiling concrete silos of Vancouver.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

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

A giant Troll lurks under one of Seattle's oldest bridges.

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

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

A beautiful final resting place for some of the noteworthy deceased.

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

The magic's in the hole!

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

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

This painted blacktop brings the classic arcade game to life.