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

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

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

The northernmost truck stop in the United States.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

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

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

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

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

You can find America's highest suspension footbridge at Grandfather Mountain in North Carolina.

Rural churches in the middle of nowhere with religious frescoes by famous artist.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A bit of retro transportation flair preserved in the world's largest department store.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

One of the oldest living oak trees in the Southeast.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Erosion and various mineral deposits give this striking canyon its distinct color and soft appearance.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.