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

The atmospheric road was never meant to be so creepy.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

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

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

The world's largest collection of witchcraft regalia.

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

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

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

This 1920s Dutch barge is now a floating bookstore.

Eighty million natural history specimens call this gargantuan museum home.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The largest underground lake in Europe.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

This colorful but controversial ceiling has been likened to a 21st-century Sistine Chapel.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.