• A Highland Song. I can confirm that this one is nice to take a walk through because it is a game about running through a fictionalised version of a place I frequently enjoy walking through in real life. Possibly stretching the definition of open world a little, but the gameplay is about navigation
• Shadow of the Colossus. Which is good because you do spend a lot of time walking across it.

Also, not an open world game at all, but the environments in Pacer are amazing. You barely get a chance to look at them because you’re zooming along a racetrack at 400 mph, but they’re still there. Sonashahar is a futuristic neoclassical Indian city, and I want to explore that