A giant scrawl on the skyline of south London.

The medieval woodcut-style artwork chronicles life in medieval London.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

The pockmarks across the building's facade are remnants of the Blitz.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

A mysterious shape catches the eye in this 16th-century painting.

The bronze uniforms commemorate the vital role of women during World War II.

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

The Tudor-style cottage in the middle of the square is not quite what it seems.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

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

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

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

An incarceration museum on the spot of possibly the oldest prison in England.

An unusual round church in London with a Templar past.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Protecting the dead from opportunistic body snatchers.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.