Abandoned silver mine strewn with wrecked and twisted structures.

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

Despite being one of the most photographed vistas in the Rockies these twin peaks are rightfully known as the "Deadly Bells."

When ecosystems collide in the arid Southwest.

The highest bridge in America was built for an almost unnervingly small amount of money.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

In one of America’s oldest mountain ranges, a long-awaited section of a scenic highway is now open to the public.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Unique tower has outlasted a takeover of the company.

These massive concrete balls were used to mine gold in Virginia.

The airport was once a Civil War battleground, and the earthwork defenses can still be seen today.

The romance of early commercial flight still fills this Art Deco destination.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

This labyrinthine resting place of Black American leaders has been reclaimed by nature.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

At 207 feet, one of the world's longest continuous escalators.