Witches are relatively uncommon in the Overworld where this player encounters them, as they're typically found in cave networks and Minecraft Swamp huts. Milk is a quick cure to the Witch's poison ...

It has a nice big ravine with a mineshaft, villages, a witch hut, and even a shipwreck right near spawn. The source for this seed can be found right here. This seed is full of content to make use of.