The highest point in Delaware is located under a trailer so this marker across the street will have to do.

WWII-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers. .

The historic home still shows the scars from a little run-in with the British in 1813.

A scenic fort on the harbor protected Philadelphia from an attack that never came.

A wrecked ship dating back to the American Revolution was only recently discovered off the Delaware coast.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

The longest-covered bridge in the state of Maryland.

Rumors persist that a bottle of whiskey is sealed within this Demijohn-shaped adornment.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

The ruins of an old mill lie in a small ravine along a hiking trail near Little Seneca Creek.

The oldest military monument in the United States.

This suburban park recalls the history of a famous tavern. Despite the name, it's no ordinary place!

This statue honors the author's groundbreaking family story.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

The final resting place of an iconic drag performer is decorated with pearls and hot-pink lipstick.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

This bell is one of the last remnants of the lost city of Triadelphia.

The hidden ruins of a mill that is linked to an attempt to assassinate the vice president of the United States.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

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

Explore the legends surrounding these mythical sea creatures inside this museum.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.