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

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

A 18th century graveyard and its astonishing cortege of macabre iconography.

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

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

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

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

A fantastic castle rumored to be the birthplace of King Arthur.

400-year-old garden, restored to beauty.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

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

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

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

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

The fountain marks the area where hundreds of accused witches were burned at the stake.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

One part local history, 99 parts gruesome haunted house.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

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

A 30-acre garden inspired by the principles of modern physics.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The world's largest collection of witchcraft regalia.

Banksy gives themself artistic license with this piece of London street art.