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

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

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

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

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

The commemorative stone column conceals a secret laboratory.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

London's marvelous wildfowl reserve along the Thames.

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

An unusual round church in London with a Templar past.

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

Eighty million natural history specimens call this gargantuan museum home.

The cedar tree in Highgate Cemetery earned its title by accident.

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

A little slice of Japan and its aesthetics in London's Holland Park.

The Origin of On the Origin of Species.

Nearly 2 billion seeds from 38,000 species are stored and processed at this visitable facility in a quiet corner of England.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

It is against the law to obstruct the view from the top of this English burial mound.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

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