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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

Rebuilt remains of a temple to Roman god Mithras.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This stream-carved gorge has inspired poets, hidden smugglers, and trained soldiers, all without losing its beauty.

The curios of pharmacist and collector Henry Wellcome.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

These ornate arches show how the course of the River Thames has changed.

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

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

London's smallest police station is barely the size of a phone booth.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

In the 19th century, this pit housed a fully grown black bear for the entertainment of visitors. Today there is a sculpture in tribute to the poor creature.

Long-secret natural history museum, featuring the skull of a "Terror Bird."

One of the last doorless, continuously moving elevators still in use in the U.K.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

This police call box harkens back to an era of pre-radio communications, and has a rather unique feature.

This magnificent mural was created with over 30,000 colored bricks.

Amidst towering office buildings, a local pub lives inside Sheffield’s oldest surviving domestic building.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

Explore Hull's historic Old Town by following the sea creatures scattered throughout its charmingly cobbled streets.

The phone booths in this English town have distinctly milky hues.

What looks like missing grout is actually an old pub's peephole.

Despite its ornamental looks, this towering Tuscan-inspired anomaly was a masterpiece in hydraulic engineering.