The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

Amsterdam's Red Light District leaves little to the imagination.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

An artifact taken from one of America's shortest wars.

The poems Nathaniel Hawthorne and his wife Sophia etched into its windows are still visible today.

Super-heavy Nazi architectural experiment.

An eccentric inventor's castle home with its own indoor weather system.

Palatial mansion estate used in films including "Flowers in the Attic" and "The Witches of Eastwick."

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

One of two lighted lanterns hung in the church belfry on the eve of the Revolutionary War to warn that the British were on their way.

These whimsical works of art tell the story of the city's past and present.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

The headquarters in Salem doubles as an occult art gallery.

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

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

At the supposed instruction of Ben Franklin and Socrates, a Spiritualist believer intended to birth a mechanical messiah here.

Step back into the glory days of Florida's nascent tourism industry at this Gilded Age palace.

A gleaming white tower in ornate Indian style soars above the low-slung bungalows of north Tampa.

A hidden beach at the end of a tunnel of mangrove trees.

After a long career, a disastrous sinking, and a half-successful salvage, this Naval vessel-turned-artificial reef ended up exactly where she was supposed to—with a little help from nature.