Witch Towers, Winter Castles, and Waterfalls

Not too sure if anyone else has already proposed these ideas (I guess they have but regardless,) I want to give a few ideas to make the game a bit more exciting, I guess. Exploring biomes is fun and all, but finding structures are the fun parts of exploring, at least for me. I was thinking, Taiga is a nice biome, but there’s not too much to do there, why not add a tower where you find a witch at the top, and encounter traps and mobs on your way up the tower? Also, snowy mountains are cool… if you’re only there for the goats and emerald mining possibilities, but they’re a bit bland, can we add a winter castle on top of a snowy mountain, to make it interesting? Let it be overrun by strays, maybe a polar bear or two, maybe add a winter-themed witch or new mob? The castle can be sort of like a woodland mansion, only different significantly, with armour on armour stands like you see in castles with suits of armour… then in addition, there’s snow golems trapped in the dungeon? A chest here could also have a frost walker enchantment book. Lastly, waterfalls as is now are nice, not going to lie, but they could be better! Imagine finding a beautiful looking waterfall, and in classic fairytale fashion, there’s a cave behind it, with a chest. I think this would also be a great place to use as an underground base entrance, the waterfall, hiding the front door.