The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

Mile-long cave system near Great Smoky Mountains.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

A unique geological area spiked with wind-carved rocks that resemble teepees.

Nature's biggest mammal swims in landlocked Oklahoma.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

The first declared National Monument in the United States.

This rustic old building is said to be the most photographed barn in America.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

The only surviving prototype for Buckminster Fuller's house of the future.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

The origin of the Nixon tapes is rooted in technological incompetence as much as secrecy.