This poignant art installation raises awareness of violence against women.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

One of Oxford's greatest treasures likely belonged to the legendary King Alfred the Great.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

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

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

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

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

This overlooked street light once served as a KGB dead letter box.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

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

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

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

One of the greatest movie directors of all time lived and worked in this London flat from 1926 to 1939.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A little slice of Japan and its aesthetics in London's Holland Park.