This Native American settlement dates back to the Pueblo II period.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

“Live hard, ride fast, eat pizza” at this joint filled with Evel Knievel memorabilia.

Back in 1952, you could get a mushroom cloud chaser with your atomic cocktail.

The first memorial dedicated solely to the Black troops who fought for the Union.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

Perhaps the most scandalous statue of America's first president.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

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.

The tunnel under the Capitol Building where Congress takes out its trash.

Washington's iconic carousel has a nice piece of Civil Rights history.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

"Congress may voluntarily remain in session throughout the summer, in order that our Congressmen may be protected from the intolerable discomforts and dangers of the ordinary outdoor weather!”

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

One of the ghostly stops along Route 66.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

The last Americana on Route 66.

Hundreds of trees made from glass bottles make up this forest on Route 66.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.