This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

The drama of nature in full effect in this Nevada State Park.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

A community gathering place that once housed half-ton tanks and the World's Fair.

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

A rare kind of blue bear can be found chiefly in the national park that shares their name.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

These pretty kitties killed and ate as many as 135 railway workers.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Vermont's hills are alive with the sound of music at this historic hotel.

Hidden in the New Mexico desert southeast of Roswell, nine small deep lakes formed inside sinkholes.

A preserve with 75,000 ancient drawings remains the realm of public – not just scientific – exploration.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Legends surround this jagged rock formation in the New Mexico desert.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

The remnants of the base where US Army troops learned how to fight in extreme conditions.