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

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

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

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.

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

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

The largest greenhouse in the world is home to over one million types of plants.

A network of concealed passageways lies within a busy London Underground station.

A unique waterfall that some believe attracts the fairfolk.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A cluttered and astounding collection of antiquities and curiosities.

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

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

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

The remains of Crystal Palace Great Exhibition of 1851.

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

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

The final resting place to 300 Victorian-era pets hides inside the city park.

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

This tangled English forest looks like something right out of a fairytale.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Remnants of a Victorian garden feature sitting in public woodland.