All that remains of one of the Civil War's more deadly POW camps is a simple flagstone.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

This formerly abandoned amusement park includes a classic carousel and a replica of Mark Twain's famous hut-like Elmira study.

A historical home in upstate New York honors the work of John W. Jones, a formerly enslaved man who was a major agent for the Underground Railroad.

The little-known final resting place of one of America's greatest writers.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

A 20-foot-tall quarter commemorates George Washington’s ties to Bedford County.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Considered by many to be a local landmark and treasure.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

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

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

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

George Washington, Alexander Hamilton, and Benjamin Franklin all slept at this humble inn.

In use from 1742 to 1910, only flat headstones were allowed in this cemetery.

Home of the golf club used by Alan Shepard on the moon, and more artifacts from the sport's history.

An allegedly cursed tree represents a town's reckoning with a racist past.

In the 19th century, this canal provided power to mills, machine shops, and other businesses in the area.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.