[Mobhack]

A) they are units, not terrain

B) some are big and stand out, others are sunk into the landscape (photos are simply for illustration). Size is important - but vehicles are not big enough to block LOS and forts are simply a species of immobile vehicle.

C) None of them are 50 metres by 50 metres, remember that a hex is half a football pitch.

If a scenario designer wants a super-large "fortress" of the Krak des Chevaliers type, then he can raise the terrain height or use other scenario map editing tricks.

Andy