A monument celebrating the idea of reaching inaccessible places.

An underwater road considered a possible Atlantis location.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

The world's longest known cave system.

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

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

This popular bar has been blurring the line between normal and edgy for more than 75 years.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

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

A wall of chewing gum moonlights as collective art.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

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