At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

The first railway tunnel to cross the Continental Divide and, at 11,523 feet, was once the highest railroad tunnel in the world.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

This super steep hike ascends 2,000 feet in less than a mile.

Colorado's only true geyser is hidden within the San Juan National Forest.

Two creeks flow out of either end of this canyon in opposite directions.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Take a dip in the world's largest mineral hot springs pool.

Let Ouray’s tallest waterfall sweep your breath away on a dealer’s choice of scenic hikes.

You might want to bring a rain jacket to this travertine triple waterfall.

In the middle of the Alaskan wilderness, lies a train trestle to nowhere.

A historic area for shopping and dining in Ketchikan's former red-light district.

The beginning of the historic Iditarod Trail connecting the Alaskan cities of Seward and Nome.

This mile marker stands at the unofficial end of a highway built to defend the United States from a Japanese invasion during World War II.

This Alaskan town appoints the general store's resident feline as honorary mayor.

The first Russian Orthodox church in North America and an Alaskan landmark.

A 30-mile-long glacially-carved canyon leads to a massive pair of glaciers.

Considered by many to be one of the most dangerous highways in Alaska.