Divinity: Original Sin Enhanced Edition is set in the world of Rivellon, where all the Divinity games take place.
There are 4 main regions in Original Sin - Cyseal, Luculla Forest, Hiberheim and Dark Forest. Each of these regions are further divided into much smaller sections, towns, villages, caves and beaches. There are a vast variety of locations with each having its own distinct feel and being easily recognizable. The game could be played to explore these beautiful sceneries alone!
In addition to the main 4 regions, you also have the Homestead which serves as a hub of sorts, somewhere in Time and Space where you can discover new rooms to upgrade your party, store your characters and even change your appearance.
If you want to see Location page of Divinity Original Sin2, click here.