Fittingly, America's museum of architecture is itself a magnificently designed old building.

Look closely and you’ll notice that the color changes a third of the way up the tower.

The site of the climactic scene from the classic horror film is now a historic landmark.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

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

The national park was once a plantation estate.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

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

This old-fashioned carhop restaurant gave the world the waffle cone.

The time thousands of bags of chips washed ashore in the Outer Banks is memorialized in a local museum.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

Cadillac where country's first big star was found dead.

The whimsical construction on the roof has given rise to many a Montgomery myth about its contents.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

The country music legend's grave is surrounded by Astroturf because fans kept plucking out the grass.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

Monument to the cotton-destroying boll weevil.

An Alabama courtroom where two famous American authors played as children became the setting for a Pulitzer Prize-winning novel.

The highest point in Florida is still the lowest high point in the country.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.