Well, ye’ve found the place alright…
Umbria is a large island continent situated in the northern hemisphere of the planet Theras. The inhabited landmass is about 3 million square miles, though there is a frozen wasteland of unknown size that extends up north of the large mountain ranges (the planet’s polar ice cap, essentially).
It is mostly populated by the human Nords, though there is also fair representation of native elves, dwarfs, gnomes, and the monstrous humanoid races. Of note, there are no native halfling populations on Umbria, so these folk in particular are viewed with suspicion, or just assumed to be gnomes.
Umbria is quite far removed from the other continents on Theras, and so for much of its history remained isolated from outside influence All of this changed at the end of the Second Era when travelers from Hellenos arrived in Garrisport.