Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

Internationally recognized group that works to protect the wolf and educate the public about its plight.

Villas that once served as playgrounds for the rich now fall away in decay.

This fantastical icy castle is built anew every winter.

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

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

A cemetery housing wild west legends in South Dakota.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

The liveliest ghost town in the state.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Wild West history in Hollywood style.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

This Wild West attraction is alive with glitching automatons.

One man's vast collection of artifacts and ephemera from matchbooks and postcards to vintage neon signs and cars.

This might just be the TARDIS of bookstores.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.

Shakespeare has been brought to life in this open air theater for the better part of a century.

This off-limits room in the National Library of France is home to a system of pneumatic tubes, once used to bring books to readers.

This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

The Mighty Wurlitzer organ continues to belt out the tunes at downtown El Segundo's historic home for silent and classic movies.