The remains of a sunken military ship wreck visible through clear water.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This massive underground salt mine now holds a sci-fi theme park in its depths.

The prototype for all Nazi concentration camps.

An old slave lookout in Cuba's historic sugar cane fields.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

The overgrown remains of an old rail bridge rise above the valley like ancient Greek ruins.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A museum dedicated exclusively to the lore and history of ouija boards.

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

On the upper deck of this church-owned parking garage stand eight pillars topped with different Catholic saints.

A dazzling display of lights and crystals.

An abandoned, rusty old relic of railroad history stands at attention over the Cuyahoga River.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

This magnificent Cincinnati graveyard is also a popular public park.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

The world's longest known cave system.

An architectural statement of artistic intent smack in the middle of Providence, Rhode Island's Colonial uniformity.