This historic London residence was once the womb of Scientology.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

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

A cluttered and astounding collection of antiquities and curiosities.

The anatomical-pathological collection of a man who changed surgery.

A mysterious artist-run cabinet of curiosities and library.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

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 oldest optical museum is an odd collection where the exhibits look at you.

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

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

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

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

A friendly pub with a sordid past in cock fighting.

Eclectic final resting place of the controversial explorer.

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

Traveling collection of amazing automata.

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

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

A historic arboretum and non-conformist, non-denominational park cemetery.

One of the world's largest collections of pathological specimens.

Repository for more than 22 million pickled specimens.

Catacombs turned marketplace.