A little-known memorial to servicemen and nurses killed in the line of duty during the First World War.

A floating cat sanctuary on an Amsterdam canal.

The attic of a four-century-old canal house hides a clandestine church.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

A Roman spa buried deep beneath the City of London.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A little slice of Japan and its aesthetics in London's Holland Park.

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

An overgrown collection of miniature buildings still stand as evidence of one couple's obsession with The King.

Mystery surrounds a famous marshal of Napoleon's army.

The site of the deadly Triangle Shirtwaist Factory Fire.

The first piece of public art dedicated to LGBT rights.

The oldest living tree in Manhattan comes shrouded in sinister legend.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.