19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

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

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

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

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

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

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This hidden green space is the city's second largest conservatory.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

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

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

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A mysterious artist-run cabinet of curiosities and library.

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

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

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

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.

One part local history, 99 parts gruesome haunted house.

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

Banksy gives themself artistic license with this piece of London street art.

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

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