The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

This public park was the site of the largest civilian disaster of the Civil War.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The secret city built by the Manhattan Project.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A roadside park in eastern Maine first marked the halfway point between the equator and North Pole with a brass pin in 1896.

This Maine bridge may be the last wire-supported bridge of its type in the world.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

It would take 35 firetrucks to fill this enormous glacial pothole.

These disused steel furnaces are now haunting ruins that may one day be a national park.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

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

An abandoned stretch of highway, deteriorating next to the operational one.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

World's first "penitentiary," meant to be humane, drove men insane.

The most decorated dog of World War I is preserved in the Smithsonian.