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

The largest of London's subterranean rivers and once a mad, bad center of London life.

The final resting place to 300 Victorian-era pets hides inside the city park.

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

A mysterious artist-run cabinet of curiosities and library.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Remnants of a Victorian garden feature sitting in public woodland.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

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

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

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

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.

The curios of pharmacist and collector Henry Wellcome.

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

One part local history, 99 parts gruesome haunted house.

A student driver's nightmare.

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

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

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

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.