Scattered throughout London are ancient remnants of the city's former bounding wall.

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

A memorial for public executions that dates back to the 14th century.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

The Great Fire of London and the regulation of one-way streets both started in this alley.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This tribute to the fictional detective stands at the famous literary character's address.

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

Over several decades, one of London’s most iconic city gates was dismantled, moved out of the city, and then moved back.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

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

An unusual round church in London with a Templar past.

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

One part local history, 99 parts gruesome haunted house.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

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

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Giant, friendly pelicans in Central London, the most unlikely of places.

One of America's founding fathers lived in this London lodging between 1757 and 1775.

This coffee shop lies hidden beneath a historic church.

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.