This sign designates the road that leads to the infamous Area 51.

Mysterious meeting place for UFO hunters near Area 51.

The self-proclaimed gateway to the Extraterrestrial Highway.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

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

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

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

A giant open-air sculpture made of over 200 full-sized boats.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

Where the famed frontiersman was born, raised, and survived Quaker intrigue

A failed piece of Orientalism has become the proud symbol of a community.

A well-preserved example of an early industrial operation in the northeastern United States.

The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

A Circus legend leaves an unexpected endowment.

For 32 years the famous Ringling Bros circus troupe spent winters in this sunny spot in Florida.

The site of Neil Armstrong's first flight is marked by a full on replica of the moon landers.

This alley-cum-fan gallery in the ex-Nirvana drummer's hometown holds the world's largest drumsticks.

Every last book in this bookstore is signed by the author.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.