These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The famous author's cottage hideaway.

Ruins of a Carnegie family mansion on Cumberland Island.

This ancient sinkhole-turned-healing-pool is a treasure trove of archeological discoveries and may even be the Fountain of Youth.

Legends surround this jagged rock formation in the New Mexico desert.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

A medieval castle in the middle of rural Texas.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

The secret city built by the Manhattan Project.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

Here’s how Robert the Doll earned his reputation as the most haunted doll in the world.

Faces carved into the cliffs create an otherworldly walking trail.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A popular swimming hole that hides one of America's most deadly diving spots.

A collection of full-size movie monsters opened to the public.

This bridge is haunted by the ghost of a distraught mother.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

148 feet long and in the middle of a verdant forest.

These banned cigarette vending machines now sell little pieces of pocket-sized art.