This 1920s Dutch barge is now a floating bookstore.

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

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

400-year-old garden, restored to beauty.

Remnants of a Victorian garden feature sitting in public woodland.

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

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

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

The longest hedge maze in the world.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

A student driver's nightmare.

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

Eighty million natural history specimens call this gargantuan museum home.

A tongue-in-cheek arcade where the games are based on everyday life.

Famously misunderstood wonder of the ancient world

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

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

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

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

The sign at the garden gate reads: "These Plants Can Kill."

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

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.