Yora
Legend
You're in luck, I've been working on exactly these things for the last couple of years. ^^
What should always work well is to have a situation that makes the local spirits near the village unhappy. Unhappy spirits mean people will disappear in the forest, harvest is bad, wells become spoiled, and other such maladies.
But spirits are weird and the things that make them unhappy, as well as the things that calm them down again, can be very strange.
Simple things are someone went to a place where the villagers are not allowed to go, so they need an outsider to check it out and find out what can be done to repair the damage. Or a regular offering is not made on schedule and now the spirits demand compensation. Or a magic ward has been disturbed, allowing evil spirits to enter the village, and it needs special items to be repaired.
In worse cases, something is going wrong in the spiritworld and it has effects on the mortal world and someone needs to go to the spiritworld and fix it.
While there are few ruins made by mortals, there also can be spirits or fey folk who have build structures in ancient times. They too can make great dungeons.
What should always work well is to have a situation that makes the local spirits near the village unhappy. Unhappy spirits mean people will disappear in the forest, harvest is bad, wells become spoiled, and other such maladies.
But spirits are weird and the things that make them unhappy, as well as the things that calm them down again, can be very strange.
Simple things are someone went to a place where the villagers are not allowed to go, so they need an outsider to check it out and find out what can be done to repair the damage. Or a regular offering is not made on schedule and now the spirits demand compensation. Or a magic ward has been disturbed, allowing evil spirits to enter the village, and it needs special items to be repaired.
In worse cases, something is going wrong in the spiritworld and it has effects on the mortal world and someone needs to go to the spiritworld and fix it.
While there are few ruins made by mortals, there also can be spirits or fey folk who have build structures in ancient times. They too can make great dungeons.