A replica of the steam engine that hauled Queen Victoria's Royal Train is on display at Windsor.

The patch of land below the memorial was gifted by the British to the United States.

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

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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.

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A Roman spa buried deep beneath the City of London.

The commemorative stone column conceals a secret laboratory.

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

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

A memorial for public executions that dates back to the 14th century.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

Four hundred years ago, this turned-about message was carved into one of Winchester Cathedral's exterior walls.

Intricate 14th-century floor tiles hidden underfoot in Winchester Cathedral

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

A cornucopia of gargoyles adorns the oldest portion of Oxford’s Magdalen College.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.