The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

This impressive mansion in Vinegar Hill has some mysterious details in its architecture.

Walk into the 19th century without leaving Brooklyn.

A museum marks and documents the site of the Titanic's launch.

Home to the Titanic Historical Society's collection.

New York City's only preserved family home from the 19th century.

A hidden "place of interment for gentlemen."

This humble historic facade hides a history of boozing and the gentlemanly sport of rat-fighting.

Revolutionary War casualties fill the only 17th century structure remaining in Manhattan.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

This abandoned Civil War fortress is slowly being swallowed by the waters of Lake Borgne.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

Copenhagen's celebrated theme park and gardens.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.