The comparatively biggest preservation in Faroese is at Koltur  As you can see on the map below, about the whole settlement area is preservated.

I will translate the katagoris in the map too english:

-.-.-.-  = area preservated in a agreement with the farmer. -------- area preservated after § 2.2 in law nr. 19. The blue: preservated visibly monument of the past. The yellow monument of the past preservated after § 2.1 in law nr. 19. The red: monument in the field preservated in a agreement with the farmer.