John Hendrix predicted the creation of the "Secret City" built as part of the Manhattan Project.

It's clear this abandoned Art Deco gem was no ordinary cleaners.

An abandoned underground bunker not far from downtown New Orleans.

The beautiful, fruit-covered facade hints at this building's former life.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

If New Orleans is the birthplace of the "cocktail," why does their own museum of cocktail memorabilia beg to differ?

This largely forgotten piece of Cold War history stands hidden in the woods just north of the Mississippi Gulf Coast.

A Muppet museum in small-town Mississippi honors the roots of Jim Henson's most beloved creation.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

It may take some time to locate, but it's sure to warm even a heart of stone.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

The secret city built by the Manhattan Project.

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

The only retired U.S. nuclear missile silo that is open to the public.

A small town built on an abandoned airfield has former runways as streets and a bar and grill in an old airplane hangar.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

The clock that sets them all.

This super steep hike ascends 2,000 feet in less than a mile.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

One person's lost luggage is another person's treasure.

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