An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

This four-story steel sphere in Maryland was used to test biological weapons.

One New Hampshire alleyway has become home to a public gallery of feline art.

A small 19th-century graveyard tucked away in the middle of a suburban neighborhood.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

An unusual sculpture, an interesting history, in a strange place, for a good cause.

Modern art meets modern convenience in possibly the world's most architecturally important public bathroom.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

A haunting exhibit in a wildlife refuge center highlights threatened species and the conservation efforts needed to save them.

One of the oldest Catholic churches in the U.S., situated just east of Gettysburg.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.