At my hometown brewery making some cool areas for your game:
Mounds of Honor:
An ancient battlefield covered with the tombs of fallen soldiers. Ghosts of both armies continue to battle despite the attempts to placate them with a proper burial. The reason for the war is forgotten.
Cloudbanks drift across this high altitude swamp built into the caldera of a dead volcano. Massive broken statues stand from the swamp. No other structures seem to have been built though some say the statues are hollow and contain vast riches.
The Silver Dunes:
this desert of fine white salt/sand blinds travelers with its brilliance. The bed of an ancient sea it is populated with fossils and haunted by the ghosts of ancient sea creatures.
The sun’s light Savannah:
South of the silver Dunes this endless expanse of head high grass is broken only by the rare baobab tree. What structures might might be hidden under the swaying amber fields is a mystery but this land was made flat for some reason.