Places rikwilliams Wants to Go

This castle-fortress is a living example of the transition from medieval defenses to modern fortifications.

Longest canal tunnel in the world, abandoned in the 1960s.

French commune at the heart of conspiracies.

An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

Despite centuries of architectural innovation, this French castle is being built like it's the 13th century.

This secret cemetery where no flag is allowed to fly holds the bodies of American soldiers convicted of heinous crimes during WWII.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Artist and musician Will Menter creates musical sculptures.

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.

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.