Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

Ancient pueblos built into the base of a natural canyon wall.

This historic national park is covered in the stunning ruins of red rock pueblos.

See massive fossils that are over 200 million years old in northeastern Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A sharp bend in a dramatic river canyon cut through red rocks.

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

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

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

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

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

Booker T. Washington's home at the Tuskegee Institute was a gem of splendor.

Once one of the largest producers of pig iron in the world.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

Cadillac where country's first big star was found dead.

The highest point in Alabama was almost completely deforested, but is now home to protected towers and trees.

This forest school's long history lets today's visitors experience resource management learnings in a beautiful environment.

Delve into the world of auto racing at this museum with dozens of cars and racing memorabilia.

The birthplace of a tobacco empire.

Home to the first child born to English colonists in North America, this colony mysteriously disappeared while waiting for supplies.

The first documented commercial gold find in the United States.

Formerly the most gerrymandered district in the U.S., it twisted and turned along racial borders.