All castles in Heroes 3.

The Tower is a really great Castle, although it's the most expensive...

But, by the way, it has the cheapest building for 7th-level units. ;) 5000 gold is not a lot; others always cost 10000. Of course, upgrading to Titans also costs a fortune, and no one really needs Giants for free – but if you set up Giants in the 2nd week, they just keep growing and growing!
But with a very strong Dungeon, you can't quickly produce Dragons, no matter how hard you try. You also need to build a 2nd-level Magic Guild... yeah, it's cleverly designed! :mad:

But in terms of power, I like it the most, plus they have 3 archers... and one is even 7th level....

I agree, colleague... ;) And if we add the Library to the mix, it becomes clear that you should play other races more for variety.

Although this variety is worth the cost. It's boring to play as just one Castle. Both tactically and in terms of spirit. Indeed, sometimes you want to be evil :p, lead a bunch of slithering Basilisks into battle, and blast the enemy with a Thunderbird... :rolleyes:
I'm all for variety!