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

The largest of London's subterranean rivers and once a mad, bad center of London life.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

The ritual has been performed uninterrupted for nearly 700 years.

The plunge pool is a surviving relic of a rowdy royal residence.

The commemorative stone column conceals a secret laboratory.

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

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

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

Where condemned pirates met their grisly end at the gallows on the River Thames.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

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

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

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

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

A memorial to a dog that inspired rioting in the streets of London.

The last four extravagant street signs of London's historic banking street.

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

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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

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

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

This London plaque marks the spot where David Bowie's famous alien made his debut.