Home to one of the tallest church spires in Europe, this historic church once played host to King Henry VIII and Anne Boleyn.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

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

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

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

High-end antique collection housed in a centuries-old church.

This historic London residence was once the womb of Scientology.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A mysterious artist-run cabinet of curiosities and library.

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

The television series' iconic giant foot was borrowed from this classical painting.

Traveling collection of amazing automata.

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

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

Public access to clean drinking water was an instant hit among the masses.

An unusual round church in London with a Templar past.

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

A cluttered and astounding collection of antiquities and curiosities.