A beautiful geyser under environmental threat.

The only road through the heart of Glacier National Park.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

These crudely shaped folk giants may be the the second most photographed statues in the U.S.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

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

The world's longest known cave system.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The curiosities and wonders of pharmacy in a delightful historic building.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The Iowa state contender for largest pan in the world oddly only comes in second or so.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

Home to items never before seen by the public.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

The highest bridge in America was built for an almost unnervingly small amount of money.

The petroleum industry brings you the joys of hydrocarbons and largest collection of antique oil rigs in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This stunning gothic ruin was a casualty of the Indiana steel industry crash.