While in Israel in November of 2019, I stopped by the Jordan Star National Park (Kokhav HaYarden, in Hebrew) which is centered on the Belvoir crusader castle high above the Jordan river valley.

The castle itself is the type of ruins that actually give you a pretty good idea of how it used to be in its heyday. Sufficiently impressive, although once you learn that the heyday lasted barely 20 years in the 12th century, you may doubt that any OUV can be justified here.

The killer feature of the place are the views over the valley and towards the Sea of Galilee. The castle's nickname of "fine view" was not for nothing. The views themselves are worth the cost of entry, but if you have "orange card" Israel Pass (which allows one entry to almost every national park in Israel over the course of two weeks) there is no additional cost. Brochure that you pick up at reception has all necessary information, and no guidance is needed. My overall visit lasted under an hour and I was nearly the only visitor on an early afternoon.

The sites of this serial property are spread around the country, and I have not managed to fit other castles into my itinerary. But it appears that Montfort could be combined with exploration of Acre (and the caves of Rosh HaNikra, if you are doing the non-WHS stuff), while either Pelerin or Apollonia could be combined with Caesarea (and the latter is not far from Tel Aviv either).