This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

This grove was planted more than a century ago by the War Mothers of World War I.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

Hidden behind an empty field resides this early 19th-century cemetery.

The first of Lancaster's "rural cemeteries."

This iconic Lancaster everyman has been reading the same story since 1980.

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

Steepest flood safety railway in the entire world.

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

There aren't too many operational funiculars around, but Pittsburgh has two!

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

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

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

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

In this cemetery stands the country's first public crematorium.

Final resting place of one of the classic authors of horror literature.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

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