England's most famous front door has an accidental doppelganger.

This black cat was actually designed to ward off bad luck.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

This ancient Egyptian obelisk still bears the wounds of World War I.

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

A living memorial to the trees London lost during the Great Storm of 1987.

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

A statue of the original Pearly King is hidden in a church's crypt.

A mysterious shape catches the eye in this 16th-century painting.

The television series' iconic giant foot was borrowed from this classical painting.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

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

The broken skateboards that became a poignant memorial to a murdered skater.

A recreation of a sign that Charles Dickens used to see on his walk home.

The London statue that imitates passersby.

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

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

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

Before becoming a poet John Keats studied here to become a surgeon.

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

King of the Saxons on top, Roman goddess of wisdom on the bottom.

The arching stretch of London's longest street holds many reminders of the area's maritime past.

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

A giant scrawl on the skyline of south London.