Beguiling Bourtange is one of the most curious historical sites in Holland. Situated in a sleepy neck of the Dutch woods, the star-shaped citadel was once a revolutionary defence system when it was completed in 1593. In 1960 it was thoughtfully restored to its Renaissance glory and has since become a nationally-prized landmark. Marvel at the ingenious design, ancient cobblestones, fanciful bridges and barracks, preserved places of prayer and, of course, iconic Dutch windmills that make Bourtange so peculiar.