Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

At high tide this strange footbridge appears to have no purpose whatsoever.

Collection dedicated to brands, packaging and advertising.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

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

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

A 18th century graveyard and its astonishing cortege of macabre iconography.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

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

The anatomical-pathological collection of a man who changed surgery.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The curios of pharmacist and collector Henry Wellcome.

This series of Scottish caves has no clear purpose other than baffling historians.

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

Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

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

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

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

Hidden beneath the streets of London is a secret subway that only carried mail.

This South London cemetery holds the remains of more than 15,000 people.