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.

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

Three hundred years of preserved Spanish colonial history in San Antonio.

The Grand Canyon of Texas.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

Hidden behind Lincoln's head is a chamber containing enamel plates documenting American history, sealed in a teakwood box in a titanium vault.

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

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

You can spend the night as an honorary lighthouse keeper in this quaint, historic beacon.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A diorama of the Civil War, fought by cats.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

Yo, Adrian!

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

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