In my 5e campaign the Shadowfell is encroaching on the material plane and the party must go to a farmhouse to rescue the individual barricaded within the house. There are large fires lit around the farmhouse presumably to keep monsters at bay, like the scarecrows haunting the nearby fields. There's also a large nest on top of the windmill for whatever attacked the nearby carriage (remains of one of the horses are near the windmill) as well as plenty of plants and trees, any of which could be animated and deadly.