A quirky old tree covered in tokens, cans, and bottles of wishes.

A dazzling display of red rocks weathered into spires and hoodoos.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

Visitors to this library are in for a real-world education in modernist architecture.

The largest island on the great salt lake is home to curious creatures and strange stories.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Largest collection of mounted dinosaur specimens in the world.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

The fifth-longest natural arch in the world, and the longest outside China.

Despite its name, this route in southern Utah offers a heavenly day trip.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

A century-old miner's quarters turned mansion.

Previously a hot spring, this park remains a site of unique history, wildlife, and geology.

These petroglyphs created by ancient Arizonians have withstood centuries of exposure to the elements.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

This Native American settlement dates back to the Pueblo II period.

A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

Make a wish at what might be America's only Catholic shrine to a sinner.