Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

A dangerous narrow-gauge railroad once traced a route through this striking canyon.

When ecosystems collide in the arid Southwest.

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

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

Take a hike to this remote, scenic tea stop in the Canadian Rockies.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

Former villa and estate of James Deering developed to preserve native tropical forests.

A beautiful geyser under environmental threat.

An architect's childhood fantasy treehouse made real.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

A lush oasis full of vibrant plants and striking geometric displays.

This stunning mass of ice spans 121 square miles and is still growing.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A deserted hodgepodge of experimental structures designed by nearby university students.

European castle ruins in an American state park are actually the product of death and grief.