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

Indiana's shrine to the sport that has become a hallmark of their culture.

A giant lumpy candle serves as a beacon for this highly scented pit stop.

You thought Santa Claus didn't exist, but it turns out you were wrong.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

A small side chapel in Santa Fe's basilica is home to the oldest statute of the Virgin Mary in North America.

Home of the International Space Hall of Fame.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

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

This is one really big nut.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

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

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Where commuters walk through remnants of an ancient Greek necropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

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

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Deliberately hidden for centuries, the magnificent Saadian Tombs were eventually uncovered in 1917.