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

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

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

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

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

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

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

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

A historic, century-old house plopped along the perimeter of Houston's ballpark.

This hollowed salt dome is the largest oil storage facility in the world, hoarding 250 million barrels of crude oil.

A community gathering place that once housed half-ton tanks and the World's Fair.

The longest and widest floating bridge in the world.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

See massive fossils that are over 200 million years old in northeastern Arizona.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

The world's first commercial spaceport is a disappointment of cosmic proportions.

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

A serene temple with stunning stained glass hides in downtown Dallas.