I have no idea why Entrevaux is not better known. I had never heard of it before staying in Annot and I can't remember hearing of it since until I found some web references when I was researching for this. Yet it compares in my view with Vauban's better known places like Briançon.
Entrevaux is a site that lends itself to defence and siege resistance. It was probably first formed in the 10th century for precisely its natural defensive capabilities. Residents of Glandèves, once the Roman settlement of Glanate which had been a bishopric for some time, moved to Entrevaux for the greater security of its site in the face of local skirmishes and Moorish incursions.
Vauban carried out major fortification work at the start of the 18th century and left the near fairytale place that still exists.
Oddly enough it would appear that at one time this sort of thing was not appreciated and the immediate adjuncts of the station are very far from impressive. It would be difficult to devise planning regulations that this area could pass. However you do not feel called upon to wait far the first train in either direction as it is apparent that within an easy five minutes you can enter a very different world of narrow twisting roads, of archways, bridges and fortifications.
If you should tire of this Entrevaux, like Annot, is a good start for walks into the mountains although there is nothing else of particular appeal in the town - but for most people strolling around for a few hours would seem a pretty wonderful experience.