These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The largest greenhouse in the world is home to over one million types of plants.

This London plaque marks the spot where David Bowie's famous alien made his debut.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A fantastic castle rumored to be the birthplace of King Arthur.

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

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

Catacombs turned marketplace.

Journey through this open museum where even employees remain true to period.

A modern English garden of eccentric beasts, follies, and oddities.

The oldest candy store in England has been selling traditional sweets since 1827.

Astonishing rock formations dot the Brimham Moor landscape.

One of the oldest and certainly best preserved Cistercian abbeys still in existence.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

Brussels' favorite peeing boy has a sister.

A largely overlooked statue that may commemorate the first publication of 'Don Quixote' outside of Spain.

A little sculpture with a large wardrobe.

A rare example of World War I trenches from the British front.

A moving memorial to the fallen and missing from WWI trenches.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.