This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Eclectic final resting place of the controversial explorer.

The Egyptian-inspired last resting place of Lord Kilmorey.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

The London statue that imitates passersby.

A monolithic monument in Greater London.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

The monster at the center of the Darwin Center Spirit Collection.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Repository for more than 22 million pickled specimens.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A historic house left in "dramatic still life."

A tongue-in-cheek arcade where the games are based on everyday life.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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