Beneath the surface, something slithers. And if you find it, prepare to be slimed and glowing.

An abandoned railroad tunnel forgotten by time awaits inquisitive hikers.

A stockpile of childhood lunch pails turned collectibles.

A white oak with property rights.

A man's home is his castle.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.

Ruins of a Carnegie family mansion on Cumberland Island.

Bad farming practices caused this unnatural natural wonder.

They call this long foot bridge a swinging bridge, but really it's the bouncing you have to watch out for.

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

Dogs, cats, horses, monkeys, frogs, and fish are laid to rest at the second-oldest pet cemetery in the U.S.

Historic home of America's sweetheart sharpshooter, Annie Oakley.

The whole world in one water tank.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

The land is home to swimming ponies and a legendary 18th-century treasure.

A hidden alley in urban Baltimore is a haven for graffiti artists.

This free, take-a-book shop seems like a trick but isn't.