A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

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

Site of one of World War I's most horrific scenes.

The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

An ancient monastery, a locked room, and a mysterious book heist.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A tree seems to grow from the ocean floor on this strange strip of sand slowly being overtaken by the sea.

At this faithfully preserved medina off the Moroccan tourist circuit you can walk through six centuries of history in one day.

The legacy of a Moroccan Jewish community is remembered at this little mouldering cemetery.

Founded as a refugee camp, now a popular tourist spot.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

Mosaics, storks, and brothels—this ancient city has it all.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Despite a fraught and controversial history this African island holds a powerful monument to the tragedy of the slave trade.