All castles in Heroes 3.

Well, if we're talking about the speed of building, I think it's easiest to build creatures.

How much faster? You don't build them in the first week, do you? My giants start breeding from the 2nd week. I think that's pretty good.
And what difference does it make if you build them on the second or seventh day of the week – the overall increase is the same, and buying them in the first weeks is quite expensive.

But Fortress or Citadel with a Grail is harder to capture; their defense and attack increase significantly.

That's good. Conclusion: each Citadel under your command should have a Grail. :cool: It's a pity that you can't move the Grail around.:rolleyes: I imagined a hero jumping from town to town with Town Portal, carrying a Grail in his pocket... :rolleyes:

+ real trenches. And in a Castle, you either pass through once or use an dispel spell and that's it.

I don't understand. How are their trenches so different from the trenches of a Dungeon, Castle, Necropolis, or Inferno? :confused: I'm actually most pleased with the mines in the Tower. Especially considering the AI's glorious habit of sending a unit straight through 3-4 mines. :D "You pass through once"? Well, some pass through, and some stay there lying down.
And does dispel destroy mines during the siege of the Tower? :eek: