North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

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

An outlandish shoe shaped house built by an eccentric millionaire.

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

Winding country roads in eastern West Virginia lead to an extraordinary place populated by fiberglass giants.

This historic lighthouse was well known for the large number of women who served as its keeper.

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

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

The Home and murder site of the witch of Rehmeyers Hollow.

These small house replicas have stood proudly since the 1950s, even as the property has changed hands.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

These buildings are a poignant reminder of the thousands of horses and mules who passed through this area of the Shenandoah Valley on their way to war.

One of Gettysburg’s least visited battlefield memorials is off the beaten path, but worth a visit.

This one-room schoolhouse played a significant role in the education of Black children for almost 100 years.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

This recreation of a 19th-century dime museum is full of oddities.

Home of the only civilian casualty at the Battle of Gettysburg.

A diorama of the Civil War, fought by cats.

A giant time capsule not scheduled to be cored until 2040.