The remains of Crystal Palace Great Exhibition of 1851.

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

A collection dedicated to the treatment of disease, held in London's oldest hospital.

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

A cluttered and astounding collection of antiquities and curiosities.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

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

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

A historic arboretum and non-conformist, non-denominational park cemetery.

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

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

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

The remnants of a strange stilted building on rails can still be seen at low tide.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.