Mysterious meeting place for UFO hunters near Area 51.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

The drama of nature in full effect in this Nevada State Park.

A historic Civil War estate-turned-museum looks back on the Confederate States of America.

New Orleans' famous cemetery, located on the site of a former race track.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The largest earthwork effigy in the world.

The largest ancient burial mound in Ohio.

A real flying saucer, contracted by the U.S. Air Force.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

The same security that protects our nukes accidentally protected a gentle herd of antelope.

The first declared National Monument in the United States.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

This shallow pit was once used to send over 20,000 buffalo plummeting to their death.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A rare surviving example of a pre-WWII Japanese garden, restored after years of neglect.

America's most famous piece of self-built architecture.

Thousands of turbines whir at the origin of North American wind power.

With its peeling paint and faded sign, this theater-turned-recycling plant is a nostalgic relic of 1950s Americana.