Originally a cemetery, this city park remains speckled with a handful of scattered gravestones.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

An unusual and eclectic collection of local historical memorabilia.

The aggressively banal name of this underground fortress of bureaucracy does little to evoke its truly surreal existence.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

A "house to which to flee" for settlers in colonial Pennsylvania.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

Where the famed frontiersman was born, raised, and survived Quaker intrigue

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

This shop filled with oddities and knick-knacks is named for a 19th-century charlatan.

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

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

One of the first commercially successful anthracite-powered iron-making operations in North America.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

This historic furnace was once used to produce cannonballs during the Civil War.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

Step into a pastel time capsule where candy is truly dandy.

This colonial mansion has been home to a staggering number of American historic figures.

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.