This network of narrow, medieval passages has the most delightful name.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

This giant wooden treehouse within a sprawling garden has its own eatery.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

The oldest inn in England served brew to the crusaders.

A modern English garden of eccentric beasts, follies, and oddities.

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.

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

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

Eighty million natural history specimens call this gargantuan museum home.

Famously misunderstood wonder of the ancient world

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.

This Gothic Revival castle used as a shooting location for "The Secret Garden" and other films.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A 600-year-old mini shrine guarded by a sword-wielding knight hides in a crumbling cliff face.

The last fully working Victorian Turkish bath in England.

Where Agatha Christie mysteriously disappeared in 1926.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.