I am working on an adventure setting in the spirit of Necromancer Games classics such as "The Vault of Larin Karr" or "The Lost City of Barakus". You know, a relatively small setting with a couple of plots and developements that the players can engage with as they see fit. In terms of setting elements I want to stay classic as well, no extradimensional shape-shifting races riding on bears with laser eyes and such (you know what I mean :))
Now, my adventure setting is a remote vale with one city (10.000 citizens) and a couple of small towns and villages. The vale's river connects it with the next big city in the south-east (~100 miles downstream) and there is a lot of rading by boat. There are two overland roads as well but only few people take those. The vale is in some ways the last remnant of the old kingdom and folks still use many of the old laws, some old noble families still live there. as well.
Now, the vale is famous for a couple of things: the small but elite arcance school in the city, high-quality lumber which is send downstream, the number of dwarves living in the city (as traders and artisans, there are plans to build a dwarven colony in the mountains), and the mysterious vanishing of the elves. The city stands on the ruins of an ancient elven settlement but why the elves left nobody knows. Sometimes elven travelers come to the vale but they are looking for answers as much as the native citizens do.
Now, what kind of adventures and plots would you like to see in a setting like this? Were the elves wiped out by something horrible which will return in time? And what lurks in the mountain ranges to the north? Or are there conflicts between the settlements? Or within the main city?