This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

Dedicated to an "Unknown Man," this grave holds either the remains of a lovelorn suicide or a Cold War spy.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

New Orleans' famous cemetery, located on the site of a former race track.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

A temple devoted to inner esoteric mysteries located in a California commercial strip.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This peaceful Massachusetts graveyard was one of the first "garden-style" cemeteries in America.

Home to items never before seen by the public.

A mechanized clock where a man fights off a dragon, crab, and rooster.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

Mass graves and Victorian monuments mark the history of Memphis in this 19th century cemetery.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

This folk art compound was built by a fortune teller on the advice of three people from the future.

An unassuming secret door once led to a legendary watering hole.

A burial ground of rusting metal grave markers.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

A former electrical substation is now home to an eccentric junk art masterpiece.

This giant power line tower is a robot that can express its moods in neon.