These free-roaming horses were once destined to disappear from the land.

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

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

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

Limestone caves with spectacular showcase chambers.

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

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

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

The Magical World of George Phar Legler.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

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

A reproduction of earth's many biomes.

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

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A place where the laws of nature seem to have gone completely berserk... but of course haven't.

This crescent-shaped sliver of sand is a magical haven for a herd of feral horses.

A mysterious spot where the laws of gravity seem not to apply.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

A nostalgic bibliographic gem.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

An Ancestral Puebloan ruin that appears to burst into flames in the sunlight.