The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A student driver's nightmare.

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

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

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

This inn of the court provides a fascinating window into London’s legal and architectural history.

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

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

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

This Underground station has been a popular filming location for decades, even before it closed.

This 1920s Dutch barge is now a floating bookstore.

A massive volcanic plug is now a protected area that hosts a number of bird species.

An alley covered with 20 years of bubble gum.

A modern reimagining of a medieval city gate.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

A huge teapot illuminates a home for the elderly.

A statue of the second-tallest Dutchman in history.

These lights mark the area of Rotterdam that was bombed and burned in 1940.

Four giant movable street lights decorate this modern Rotterdam square.

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

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

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