aramis erak
Legend
Looking at the world map...Side trek perhaps, but other than that there's a mix of land and ocean (i.e. it's an earth-like setting), a breathable atmosphere, and that it's cold to the north (and south) and warm toward the equator, I fail to see how the geography of either of those examples lines up with the real world.
THe left two continents are distortions of North and South America. The central continent is Europe and Africa; Europe is uplifted somewhat, and the sahara is home to a sea. South Africa is submerged. Northern China and Japan are missing, as is much of the Indonesian Archipelago, but Southern China and the southeast asian mainland are intact, and indeed, are joined directly to Arabia. Australian and New Zealand are combined by uplift. Antarctica not in evidence.
It's not that much further than Hyperborea.
Oerth, of Greyhawk, is a good bit more divergent.

Oerth and the Lands beneath the Waves by Grimklok on DeviantArt

there are many great maps already done with vegetation and climate maps to go with, which makes worldbuilding quite a bit easier. Sure, there's a lot of speculation in those. Even more fun are the "post anthropocine" maps.
Here's a nifty timelapse. No promises about accuracy, but you can see similarities for the cretatious and jurassic eras to Oerth.
and another:
Many game worlds seem to use maps of drifted continents , with some added elevation change, to hide the sources.