An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

Home of the International Space Hall of Fame.

This is one really big nut.

The Grand Canyon of Texas.

Two small markers remember the Alamo's feline protectors.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

At this rural museum, visitors can experience "Boomtown U.S.A.," a lifelike re-creation of an oil boomtown in the 1930s.

Limestone caves with spectacular showcase chambers.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

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

The first Protestant church in Arizona and only Gothic Revival style adobe church in the world.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Stairs often replace streets on the steep slopes of this old mining town.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A remote desert monument marks where a priest and explorer entered what later became Arizona.

Natural earth mounds formed in the far north.

This house of worship in the Arctic Circle is shaped like an igloo.

A famed drink seasoned with an amputated toe, now on its tenth digit.

A lasting testament to the Klondike Gold Rush.

This remote fort on the Yukon River is a vestige of the wild Alaska gold rush.

The northernmost international land border crossing in the United States.