Military art

Overlooking the valley linking France to Switzerland (the Cluse de Pontarlier), Joux castle – with its keep, towers, drawbridges, surrounding walls and fort – offers fantastic evidence of the way fortifications have developed over the years. Built in the 11th century, then modified by Vauban in the 17th century, people will discover 10 centuries of history there.
© Ivoha/Alamy