The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

These temples are among the oldest free-standing stone buildings in the world.

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

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

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

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

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This striking statue brings a scene from the African savannah into central London.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

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

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

A unique tribute to the millions of animals who served and died for the British military.

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

Explore nearly 400 years of English middle-class home life.

London's largest outsider art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A curious collection dedicated to human and animal anatomy and pathology.

A beautifully eclectic mix of architectural styles.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Learn about the sweet, storied legacy of beekeeping in ancient Greece.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.