A 200-year-old prison that now houses a peculiar crime museum.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

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.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

The decaying ruins of Wales' first asylum for the mentally ill.

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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

400-year-old garden, restored to beauty.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

The fountain marks the area where hundreds of accused witches were burned at the stake.

Eighty million natural history specimens call this gargantuan museum home.

The curios of pharmacist and collector Henry Wellcome.

One part local history, 99 parts gruesome haunted house.

An unusual round church in London with a Templar past.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Famously misunderstood wonder of the ancient world

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The world's largest collection of witchcraft regalia.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.