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

The ritual has been performed uninterrupted for nearly 700 years.

A domino effect created with Britain’s iconic telephone boxes.

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

The sculpture of the deceased cockatoo flops atop its personal plinth.

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

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

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

Ship-sized kinetic sculptural fantasy.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

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

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

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

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

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

These morbid carvings remind churchgoers of the inevitability of death.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

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

Two plaques commemorate the site of Shakespeare's first theatre.

Public access to clean drinking water was an instant hit among the masses.

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