A 18th century graveyard and its astonishing cortege of macabre iconography.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

This original castle in Kendal is 1,000 years old.

Two minuscule windows are tucked inside this medieval building.

This covered bridge was used by both Union and Confederate troops during the Battle of Gettysburg in 1863.

This massive sycamore tree has been labeled as one of the largest in the state.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

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 glory of one of the oldest roller coasters still standing.

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.