I've been to Neuf-Brisach (Neubreisach) in Alsace a few times (on my way to nearby beautiful and touristic Colmar). It is a small town near the German border with monstrous fortifications. They are so huge and out of proportion for the small and insignificant provincial town that they almost look ridiculously bombastic. Nonetheless, they are really impressive. Other than the walls there is nothing to see in Neuf Brisach.