This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Celebrated as a center of civilization, the remains of the ancient city have been nearly destroyed by greed, egoism, and war.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

A castle built for love, and abandoned due to heartbreak.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

One of Scotland's most important modern structures, it just made the '100 Most Endangered Sites' list.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

Ruins of a once-opulent grand Victorian resort.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

The largest underground church in Europe.

The bones of an old zoo crumbling in the shadow of a new one.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

This Italian foot path winds through the mountains via 52 individual tunnels.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Crumbling ruins mark the site of a couple's grisly murder in the woods.

Hundreds of hidden passageways weave through the old quarters of Lyon.

"A hideous albatross in the Hudson River Valley."

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.