England's oldest surviving hedge maze has been confusing visitors for over 300 years.

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

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

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

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

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

The final resting place to 300 Victorian-era pets hides inside the city park.

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

A plaque marks the underground site of one of London's "lost rivers."

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

This luxury shopping lane has been protected by its own tiny police force for over a century.

Traveling collection of amazing automata.

A mysterious artist-run cabinet of curiosities and library.

A rather vulgar example of the transition from Latin to the Italian vernacular.

Harlequin costumes, signed scripts, and armor-wearing puppets.

Ancient ruins hidden underneath a modern luxury hotel.

The former home of an Italian artist is now a shrine to his ambitious works.

A sculpture serving as an homage to Pope John Paul II.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.