100 Corpses to Find in a Dungeon gives 100 different descriptions for bodies that could be found in a dungeon, or perhaps other locations too. Often having died in ways that are odd or appear to warn of hazards or monsters, whether or not there is any truth in those suppositions is up to the GM.
The Hermit of Castle Ruins is a drop-in location. Some nearby ruins are inhabited by a creature that the townsfolk have tried and failed to kill once. There is a reward for its destruction, or will the characters investigate more deeply?