Elvis's own personal tropical hideaway.

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

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

This cathedral dedicated to Louis IX, sainted King of France, holds many secrets.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

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

The tunnel under the Capitol Building where Congress takes out its trash.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

The only Leonardo Da Vinci painting in the Western Hemisphere.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

The final resting place of New Orleans' most famous voodoo priestess.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

Sit at the "Disney table,” where Walt and his team of "imagineers" once dined on the regular.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A Natural History and Science Emporium.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

New York's southernmost subway station is whimsically wavy.