If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A popular rock that acted as a waymarker for American pioneers.

This church is named for one of the most dramatic tales in the early Christian church.

These clocks tell time in a theological sense.

The king of U.S. high points towers over every other peak on the continent.

A copy of the famous bus used during the filming of 'Into the Wild' is on display at an Alaska brewery.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

The northernmost truck stop in the United States.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

A trading post in the North Pole where children send letters.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

This super-sized statue is the only public memorial to the deal that ended America's neutrality during World War II.

Once the center of Gold Rush mania, now the starting point for the Yukon Quest sled dog race.

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.

Third time's a charm, or in this case, two testicles are.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.