This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A daily replay of the experiment that proved the rotation of the Earth.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

The hidden jewel of Disneyland: a members only playground for the Disney elite.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

A toxic ghost town sitting atop a massive coal fire.

These magnificent 240-year-old machines are considered distant ancestors of the computer.

The bears of Bern have been a city highlight for over 500 years.

Where Mary Shelley’s "Frankenstein" and John William Polidori's "The Vampyre" were born.

A historic observatory precariously perched at the "Top of Europe."

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Final resting place of the immigrant who brought artificial seltzer water to America.

A way to take your secrets to someone else's grave.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The oldest surviving botanic garden in the United States.

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

A historic covered bridge is but one example of an oddly prevalent American urban legend.