A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

The western face was supposedly left clock-less to snub the Welsh.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.

A mysterious demonic figure peers down from its perch within the gorgeous Chester Cathedral.

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

The medieval woodcut-style artwork chronicles life in medieval London.

The bones of two medieval royal lions were discovered at the historic fortress.

The pockmarks across the building's facade are remnants of the Blitz.

The bizarre headgear looks like it was made for a fool, not a king.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

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

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

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

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

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

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

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

The ritual has been performed uninterrupted for nearly 700 years.