Final Fantasy XIII. That game released in 2009, yet from the looks of it seems like a next gen game. The amount of work that went into graphics and environment design is astounding.

Every location is unique and a joy to look at. From a futuristic sprawl to a lake that crystalized while still in motion, to a synthetic forest to a wild ravine full of flora and fauna. I spent so many hours just looking at things and enjoying the scenery and the music.