Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The commemorative stone column conceals a secret laboratory.

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

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

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

This inn of the court provides a fascinating window into London’s legal and architectural history.

This is London's smallest listed building.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

A jumble of concrete on the corner of one of London’s terraced buildings is actually a work of art.

The anatomical-pathological collection of a man who changed surgery.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A haunting painting meant to capture the calamity of World War I.

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

The bronze uniforms commemorate the vital role of women during World War II.

A haunting monument dedicated to the Royal Naval Air Service and the Fleet Air Arm.

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

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

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

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.