2300-year-old Roman road connecting the empire.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

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

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

An architectural oddity hides in plain sight on this iconic London bridge.

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

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

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

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

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

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.