Probably because swamps are not the most appealing landscapes mostly, no reply for you, yet. So I'll do.
;-)
I like these basically. I'm not sure about the treatment/ processing, but cannot put my finger on it, though. I guess it was already subdued colors, and a B/W from that? Or the relatively low contrast? But the tones are well indeed. Maybe they're a little too wide? Maybe just a little of it all.
It's a hard subject. There are landscapes pretty similar to that around here (north-east Germany), and I tried to photograph them with little success until now, your's a way better and you got an decent sky. May I ask, where that is?