An incarceration museum on the spot of possibly the oldest prison in England.

Rebuilt remains of a temple to Roman god Mithras.

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

The largest of London's subterranean rivers and once a mad, bad center of London life.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The taxidermied remains of a once-great parrot.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

Dictionary Johnson’s favorite feline.

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

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

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

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

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

London's smallest police station is barely the size of a phone booth.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

North Carolina's finest examples of Native American pictographs have survived for 5,000 years.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

This museum glorifies the humble potato.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.