Bizarre lunar-like landscape with thousands of large stone "hoodoos."

One woman's Viking Castle on Lake Tahoe.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Canyon walls shrouded in ferns.

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

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

Life-size figures portray depot attendants, train crew, and passengers frozen in time at the oldest railroad station in Arkansas.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

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

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

A motel dedicated to Southwestern nostalgia.

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

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

Every president in history is immortalized in bronze in downtown Rapid City.

The first declared National Monument in the United States.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Strange physical sensations and optical contradictions keep visitors coming back for more.