Two massive rock outcroppings on the Oregon coastline.

Stroll through a wonderland of stupendous moss-covered trees.

This expansive bridge in the Canadian wilderness was originally just built for friends.

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

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A desperate final message left by a POW on the run serves as a memorial for himself and the 97 that died with him.

This elaborate temple was built around one of the Buddha's teeth.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Pilgrimage site for star-crossed lovers.

Go inside to really appreciate this 500-year-old technological masterpiece.

This bazaar is one of the oldest in the Arabian world.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

This popular tourist cave was ignored for almost 200 years before being mined into an attraction.

The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Major tourist destination known for its bubbling mud-pools and hot thermal springs.

Romania's triumphal arch looks out over Bucharest.