Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

This 19th century machine put animals (including humans) in boxes to study how they metabolized calories.

Penn State's giant bug collection.

No one knows who painted this mysterious mural in a Penn State basement.

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

Behold the rickety wooden glory of the world's oldest operating roller coaster.

Journey through a collection of over 35,000 Halloween items from all generations.

A full-service gas station known as the oldest in America.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

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

A museum and research center dedicated to preserving the history of Rolls-Royce and Bentley motorcars.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

This 19th-century hotel and spa hosted famous guests like like the Vanderbilt family, William Waldorf Astor, Helen Keller, and Jay Gould.

In 1932, Americans honored their first president's 200th birthday by planting trees.

This alleyway was named to honor the memory of a beloved local dog.

This giant, rotating globe was built to celebrate the expansion of a company that makes steam cleaners and pressure washers.

Long before the Battle of Gettysburg occurred, dinosaurs roamed the area and left their footprints on this bridge.

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

These unique rock formations were created during the Ice Age.

An industrial waste tourist attraction.

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

A well-preserved example of an early industrial operation in the northeastern United States.

One of the few remaining covered bridges in Lancaster County.

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