Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

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

Science fiction's grandfather has a fittingly marvelous tomb.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

This futuristic observatory at the top of the Pyrénées offers unrivaled views.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

A quiet memorial to those who died saving others in the heart of the City of London.

Isambard Kingdom Brunel, one of the great Victorian engineers, was the driving force behind the short-lived atmospheric railway.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A building that survived WWII, possibly on the virtue of its name alone.

A celebrated bandstand at the center of what was once the worst slum in London.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The first archaeological site discovered by aerial photography.

The skeleton of a whale that beached itself in this Irish town is now on display in their public park.

Human-made caves excavated to hide a secret society of wealthy pagans.

Vast fan-shaped British cemetery honouring American servicemen lost in World War II.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

The world's largest museum devoted solely to the whirlybird comes complete with its own chopper graveyard.