Flashy signs from Las Vegas’s past find their final resting place at this unusual graveyard.

A multi-storied adobe complex has been inhabited for more than a thousand years.

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

This monument to the victims of a tragic explosion is said to turn and look at passing cars.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

The final resting place of the camel who served with the Confederate Army during the Civil War.

One of the world's earliest skyscrapers.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

An extravagant western hotel where every floor is the "ground floor."

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

The Pentagon is so large that it was planned like a city, complete with internal highway infrastructure.

The system of air guns are fired off remotely to scare any trespassing avians.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Born a slave on the Arlington estate, Parks dug the first graves at Arlington National Cemetery, and was buried there, too.

Please don’t anchor your boat onto the Department of Defense’s underwater data cables.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

Rumor has it the hot dog stand was targeted by two Russian nuclear missiles.

The rogue roots are gradually consuming some of the historic marble grave markers.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.