A haunting tribute to pioneering photographer Clover Adams.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

A nostalgic bibliographic gem.

Home to items never before seen by the public.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A 18th century graveyard and its astonishing cortege of macabre iconography.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Banksy gives themself artistic license with this piece of London street art.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Rebuilt remains of a temple to Roman god Mithras.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

An unusual round church in London with a Templar past.

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

A naturally mummified 2,000-year-old man.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

Hidden beneath the streets of London is a secret subway that only carried mail.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

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

The glowing blue Nymphaeum of Emperor Tiberius.

A submerged archeological park still holds the wonders of a Roman Sodom.