Healing Springs that once ran red with soldiers' blood.

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

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

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

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

According to local lore, this narrow passageway through two large rocks was accidentally created by the devil himself.

An exotic reptile facility showcasing some of the rarest, most venomous snakes in the world.

From golden eagles to peregrine falcons, this rehabilitation and education center is a haven for birds of prey.

A Nessie-like monster supposedly lurks in this lake.

One of the best places to see feral Colonial Spanish Mustangs in the United States.

These eerie outliers of the lightning bug family glow a mysterious blue color.

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Originally built in 1869, this castle is currently part of Felician University's campus.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

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

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Step inside Lucy, the world's largest "elephant."

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

The remains of a century-old mansion that met a fiery demise years after it was deserted.