Sleeping Dragon Company:
Auvundale, at the easternmost exit of the Silver Moon Pass. They had freed the people from a tree possessed by necromantic spirits, and after a really tough fight, this one explodes into a rain of acid revealing the source of the corruption, down in the hole where it's roots lay, a black human bone with a skull atop glittered.
They conserved the artifact, and in a quite emotive ceremony the elven cleric of Corellon, Romul Galmel, deposited a Quall's Tree Token in the hole which had hosted the cursed tree. People hailed the heroes and offered whatever they could to them, Romul established a man who had, probably, in a long past, had an elven ancestor.
That was at level 8-13
At level 17, they returned to create a keep, people from everywhere started to come, the hamlet growing into town.
Later happenings (including a wish, a hobgoblin army, a flying giant citadel of the Stormlord, and the thrice damned black scourge: Vinthralix) got Auvundale a castle, many deaths, more immigrants, and would eventually have gotten a Mythal... But Lord Romul sacrificed his life to save the Quel'tessir from an abomination born from Grummsh's and Corellon's blood... but this already got too long.
The fact is that a Castle, sorrounded by the town of Auvundale, was the base for the party (Except Xavious Foebane... he dwelled as Thane in Mithril Hall) until the last of their adventures when Lord Romul encaged himself willingly in struggle with the Elf Eater until his life force runs out and the Elf Eater's essence is passed onto a new vessel.
Now this lords of adventure have made their ways...
Thane Xavious Foebane (Dwarven fighter, Fist of Moradin)
Theurge Magus the Crow of Mystra (his soul lost for the time being in the Shadow plane)
Ramas Mepheit (Tiefling Sniper)
"Shorty Fingers" (Elven thief and shadowdancer)