This London plaque marks the spot where David Bowie's famous alien made his debut.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

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.

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

Artists and musicians now rule over this former rail station.

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

An artistic tribute to the famous singer, just around the corner from where he was born.

English antique dealers with a taste for the unusual.

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

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

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

London's old-school healing garden.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A unique waterfall that some believe attracts the fairfolk.

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

A cluttered and astounding collection of antiquities and curiosities.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

The remains of Crystal Palace Great Exhibition of 1851.