These old doors are covered in the signatures of Rehoboth Beach artists dating back to the 1930s.

A grotesque Fiji merman dwells within this traditional Dutch-style building.

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

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

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

Hundreds of antiquated typewriters and office machinery show the technological evolution of business.

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

America's first serial killer rests in anonymity.

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

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

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

Where the "World Pinball Champion” is crowned.

New Jersey's last historic covered bridge was rebuilt from pieces of the original 19th-century structure.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A surprising museum of 20th-century technology.

A unique sculpture park that specializes in the huge and bizarre.

One of New Jersey's oldest surviving buildings still bears the mark of our former British overlords.

This tiny structure was built by the creator of the Brooklyn Bridge.

This colonial mansion has been home to a staggering number of American historic figures.

This historic old movie house was the scene of one of the Blob's most iconic attacks.