The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

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

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

Abstract dinosaur models in London.

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

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.

Surreal riveted sea forts once protected the Kent shores from German attack.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

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

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

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

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

400-year-old garden, restored to beauty.

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

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

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

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

Northern Ireland's Brobdingnagian stepping stones.

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

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."