A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

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

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

This crumbling folly looks like an enchanted left over from Middle Earth.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

This haunting stone chasm is a hotbed of mossy rock and English legend.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

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

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

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

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

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The remains of Crystal Palace Great Exhibition of 1851.

Remnants of a Victorian garden feature sitting in public woodland.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

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

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

This overlooked street light once served as a KGB dead letter box.