Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

The loneliest island in New York.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

The famous author's cottage hideaway.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The oldest surviving synagogue in New York City is now a soaring art space.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

An incredible airplane graveyard sits outside this small museum dedicated to preserving aviation history.

A former fortified tower now houses a collection of classic communications equipment.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

The only American museum exclusively dedicated to the exhibition of gloves.

A moody and picturesque riverside ruin overgrown with vegetation.

The ancient tomb acts as a calendar that keeps perfect time.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

This is the largest cemetery in Ireland and the first cemetery museum in the world.