This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

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

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

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

The remains of Crystal Palace Great Exhibition of 1851.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

An incarceration museum on the spot of possibly the oldest prison in England.

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

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

Rebuilt remains of a temple to Roman god Mithras.

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.

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

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

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

During the American Revolution, this mansion hosted failed peace talks between the British and Americans.

A town trapped in time - 1958 to be exact.

Once America's longest-manned military fort, now an abandoned hulk.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

Conflicting markers on its floor tell a tale of two city centers in San Antonio.

An antique horse-drawn hearse provided French luxury for the dead in this Texan town.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.