To truly appreciate Detroit's landmark skyscraper, you have to step inside.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

The world’s largest Masonic temple was saved by the White Stripes.

An ornate Detroit church, left empty and ravaged by time.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

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

A world-class observatory in the California desert.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant pinnacles in the sun-scorched lands of Southern Utah have been nicknamed "white ghosts."

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

Rippling sand dunes frozen in the Arizona rock.

The biggest solar telescope in the world helps reveal the secrets of our sun.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Don't blink or you'll miss it.

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

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

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

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.