Shattered columns and Egyptian pyramids outside of Paris.

The curious underground history of keeping Paris clean.

Series of underground houses inhabited continuously for centuries.

France's most famous cemetery, with some of its most curious tombs.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

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

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Two small chapels housed inside an ancient tree.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A modest stone circle in North Wales.

A village on the east coast of England that has almost completely eroded into the North Sea.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

A thousand year old oak tree survives in Liverpool.

The largest preserved walking dragline excavator in Western Europe.

The longest hedge maze in the world.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

A student driver's nightmare.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

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

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.