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

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

The world's largest fully steerable radio telescope.

Hidden for 165 years inside a building designed by Thomas Jefferson are the remains of what may be America's first educational chemistry lab.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

The hide of Stonewall Jackson's equine sidekick is on display not far from where the ashes of his bones are buried.

This campus chapel is Robert E. Lee's final resting place and a topic of debate about the legacy of the Civil War.

The oddly shaped, steam-spewing building is now an art studio and gallery.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A quintet of history museums make this Virginia graveyard as much a resting place for funereal history as it is for people.

A "hospital" where people went to be quarantined, die, and be buried in the yard.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Mysterious library of an infamous financier and spiritual seeker.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.