Yale University's home for rare works, including the mysterious Voynich Manuscript.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

The trials and tribulations of marking Poe's grave.

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.

This groundbreaking 16th-century map is known as "America's birth certificate."

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

There’s a hidden military meme engraved on the World War II Memorial.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Home to items never before seen by the public.

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

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

There aren't too many operational funiculars around, but Pittsburgh has two!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

A museum dedicated to the alleged Roswell Incident.

An eatery for UFO seekers on the Extraterrestrial Highway.

The drama of nature in full effect in this Nevada State Park.

Odd outsider art installations surround a Gold Rush-era ghost town.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A grandiose title could not save this mercantile community from obscurity.