A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The medieval woodcut-style artwork chronicles life in medieval London.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

It's a mystery why these remains were found with no traces of their bodies in sight.

The gigantic skull of a long-extinct species that once roamed the forests of England and Ireland.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Iceland's tribute to its thankless civil servants.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

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

Dictionary Johnson’s favorite feline.

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

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The London statue that imitates passersby.

Public access to clean drinking water was an instant hit among the masses.

A friendly pub with a sordid past in cock fighting.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.