All castles in Heroes 3.

Interesting name for the Tower - "Winter Castle" ;)
The combination of the Tower town and the Swamp is very interesting... usually, if people play as the Tower, they can't stand the Swamp...:o

No, quite the opposite - those who play as the Tower often like the Swamp. In both cases, a defensive strategy works (Although the castles are undoubtedly quite different...) But I like both.