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

The commemorative stone column conceals a secret laboratory.

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

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

Ship-sized kinetic sculptural fantasy.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

A cluttered and astounding collection of antiquities and curiosities.

An unusual round church in London with a Templar past.

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

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A hands-off space for graffiti artists to hone and display their skills.

The broken skateboards that became a poignant memorial to a murdered skater.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

This five-star hotel was originally a swanky parking garage.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

A unique tribute to the millions of animals who served and died for the British military.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This striking statue brings a scene from the African savannah into central London.

A mysterious shape catches the eye in this 16th-century painting.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.