The hallowed remains of a 900-year old Ancestral Pueblo great house.

Colorado's only active volcano last erupted around 4,000 years ago.

A fake mine that was made using real mining techniques which is also used as a community center.

Take a self-guided tour through one of Colorado's most elevated mining districts.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

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

It's safe—and permitted—to walk across these twin natural sandstone arches.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

A picture-perfect town, perfect for blowing up.

Dig for your own trilobites in this goldmine of invertebrates.

Improbably, the largest wildlife refuge in the conterminous 48 states sits just northwest of Las Vegas, Nevada.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

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

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

Welcome to a feel-good American drugstore, in the classic sense of the term.

A stretch of highway even lonelier than the so-called "Loneliest Road in America."

The rocks exposed at Valley of Fire State Park also occur in a much less known but equally spectacular area a few miles to the southwest.

Nearly 300,000 acres of wildlife, natural splendor, and a hidden ghost town have been designated a national monument.

An eatery for UFO seekers on the Extraterrestrial Highway.

A late-19th century diversion canal built by hand crosses Bryce Canyon National Park and is still in use.

The highest concentration of petroglyph sites in Gold Butte National Monument, plus an improbable early 20th-century dam.

The notorious Wild West outlaw was raised in this unassuming abode.