Stardew Valley mod turns this base game area into a mini DLC
This Stardew Valley mod turns the Witch Swamp into a mini DLC, complete with an NPC, quests, new items, and a handful of reworks as well.
Community Center Stardew Valley Haunted Chocolatier Witch Swamp Distant Lands Small Witch Swamp Expansion
Source: pcgamesn.com