A naturally mummified 2,000-year-old man.

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

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

These Victorian era devil sculptures were designed to spite a local vicar.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

London's amazing modernist public square that never was.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

The only medieval bridge in Britain with its defensive tower still in tact.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

A museum that chronicles the interesting and often dark history of the London docklands, once one of the major trading ports of the world.

A giant scrawl on the skyline of south London.

Murals of the wild parties once held on the frozen River Thames.

An architectural oddity hides in plain sight on this iconic London bridge.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The last four extravagant street signs of London's historic banking street.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

This luxury shopping lane has been protected by its own tiny police force for over a century.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

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

A monolithic monument in Greater London.