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

The commemorative stone column conceals a secret laboratory.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

The London statue that imitates passersby.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

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

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

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

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

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

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

These morbid carvings remind churchgoers of the inevitability of death.

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

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

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

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

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

This hidden green space is the city's second largest conservatory.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.