Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

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

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

Massive mounds of golden sand look like a desert landscape randomly plopped in an Arctic forest.

The ruins of this Alaska gold mine form a gorgeous ghost town.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

An abandoned aircraft sits submerged in a lake in the Alaska wilderness.

The king of U.S. high points towers over every other peak on the continent.

Gorgeous cave resemble a winter wonderland.

A strange house built only at night, with rumored mystic inspiration.

A Bicycle Path in the Sky.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

An abandoned Cold War missile radar site.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

This old mining town, deep in the California desert, has a year-round population of one.