The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

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

Could it have picked a better place to land?

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This collection honors the iconic, and proudly American lighter that just won't quit.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

This dramatic rail curve was once the target of a failed Nazi attack.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

A trading post in the North Pole where children send letters.

The king of U.S. high points towers over every other peak on the continent.

This candy-striped tower is the farthest east you can go in the United States.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

What is the Thing?

This 19th century granite fortification is one of the most well preserved forts in New England.

The first bridge observation tower in the U.S. offers one of the best views of Maine.