Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Art Deco masterpiece has stood in for some of the most famous buildings in comic book history.

One woman's Viking Castle on Lake Tahoe.

Montreal's giant farmer's market is a foodie's best friend, especially in the winter months.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The world's largest wooden structure.

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

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

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

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.

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