Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A book bound in the skin of an infamous criminal, along with countless other specimens.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Repository for more than 22 million pickled specimens.

A subterranean playground in an abandoned slate mine.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

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

A mysterious artist-run cabinet of curiosities and library.

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

This 1920s Dutch barge is now a floating bookstore.

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

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

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

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

360° views of the city plus five floors of optical illusions and hands-on science.

A tongue-in-cheek arcade where the games are based on everyday life.

Famously misunderstood wonder of the ancient world

The world's largest collection of witchcraft regalia.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The sign at the garden gate reads: "These Plants Can Kill."