The sand is such a bright white that on sunny days you practically need sunglasses to look at the ground.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

Abandoned Air Force base that has fallen into disrepair.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

A semi-scholarly approach to sex.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

Before Nixon, "watergate" meant canals.

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

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

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

An experimental, automotive replica of Stonehenge.

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

The first declared National Monument in the United States.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

There are eight natural springs around town, each with a slightly different taste.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

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

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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