These morbid carvings remind churchgoers of the inevitability of death.

A quiet memorial to those who died saving others in the heart of the City of London.

Where condemned pirates met their grisly end at the gallows on the River Thames.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

Eclectic final resting place of the controversial explorer.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

A network of concealed passageways lies within a busy London Underground station.

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

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

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

London's old-school healing garden.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

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

The remains of Crystal Palace Great Exhibition of 1851.

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

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.