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

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

The first declared National Monument in the United States.

Famously misunderstood wonder of the ancient world

Macabre astrological automaton clock dating to the late 1400s.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The fairy tale castle of the "fairy-tale king."

An enormous and lavish Gothic church in Czechia.

A church of bones, decorated with 40,000 human skeletons.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

An artsy hidden staircase leads to breathtaking views of San Francisco.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

San Francisco Bay's ghost town.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.