Re: Where are the Big Dumb Objects in your campaign?
I think fantasy is replete with Big Dumb Objects, but they are almost always stationary--cities, islands, fortresses, etc. Scifi tends to have more in the way of Big Dumb Vehicles, which is easier to justify in the weightless and unimaginably vast backdrop of Space. Scifi also tends to have more Small Dumb Vehicles with which to attack the Big Dumb Vehicles. In fantasy, magic could obviously support the creation of Big Dumb Vehicles, but since the setting is smaller, it's hard to justify the creation of such a vehicle to begin with.