This lush Florida island is home to the ruins of a crooked ship breaker's tiny empire.

Home to the Titanic Historical Society's collection.

Memorializing an American tragedy of massive proportions.

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

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.

One of the oldest of its kind.

Yo, Adrian!

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

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

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

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

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

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

Steepest flood safety railway in the entire world.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The oldest farmer's market in America is so ancient it was approved by the King of England.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The first American department store, and home to the largest operating musical instrument in the world.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

Huge masonic hall in Philadelphia with lavishly themed rooms.

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