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

A half-acre utopia in the New Mexico desert features a graveyard, a game of horseshoes, a library, and a mailbox.

One of the American Southwest's most extensive collections of Navajo rock art.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

A man-made island in scenic San Francisco Bay.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

An overlooked and unassuming engineering marvel.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

A hidden subterranean installation offers a view of the sky.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

The final resting spot of the Colorado Transportation Department's beloved unofficial mascot.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

This Chinese-style quartz sundial was saved in its final hour.

16,500-acre ranch filled with American heritage, geological wonders, and a giant pile of tires is the crown jewel of an intriguing tug-of-war.

There are eight natural springs around town, each with a slightly different taste.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

This iconic science fiction house still looks like something from the future.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.