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

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

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

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

The ghostly remains of what was once the world's richest copper mine.

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

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

Quite simply the largest tree in the world (by volume).

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The highest point in Washington state is a volcano covered in glaciers.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

This memorial includes fragments from one of the greatest tragedies in United States history.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

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

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

The longest living non-clonal organisms on Earth.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

The rocks in this arid basin leave trails of movement behind them.

A massive volcanic plug is now a protected area that hosts a number of bird species.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'