The fences outside some of South London's estates are made from recycled World War II stretchers.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

A relic of Victorian grandeur hides beneath a busy South London road.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

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

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

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

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

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

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

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

The secret wartime bunker built on the platforms of an abandoned Tube station.

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

Black cat statues guard this temple-like Egyptian revival factory.

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

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

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

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

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.