Sons Of The Forest is surprisingly detailed, but you don't have much time to take in the sights and the foliage when there's cannibals chasing you through the woods.

For more immersion, you might wanna try VR. And if looks is what you're after then PCVR for specific, although there are some impressive contents on mobile VR too.

Both Subnautica games and Tunic.

Rez

Elden Ring looks beautiful. You just need to get used to fighting a boss 100+ times before killing him ;_;

Horizon series is good. The 2nd game, Forbidden West is so good I used to open the photo mode at random spots and take pictures because I found the scenery beautiful. I would definitely recommend it.

Ghost of Tsushima is also beautiful. However I got bored pretty quickly but others have enjoyed the game so maybe you'll like it.

Also Skyrim with mods (like ENB) can be beautiful as well :p

Many of those already mentioned are great looking. I would add a personal choice, aesthetically pleasing for my taste: Dyson Sphere Program.

Not an entire game, but the freedom ending in The Stanley Parable is truly beautiful.

The witness can be beautiful at times, although the colours can be overwhelming at times

The Witness

I really like the hunter call of the wild. it's not perfect visually, but there have been moments when i just stop to look around and not even care about hunting

Dust: An Elysian Tale. The art in this game is colorful and beautiful. It's one of my favorite games for many reasons.

Genshin Impact, Icarus, Valheim, Stray, Cloudpunk, Growing Up, The Division 2, Cyberpunk 2077, Blockhood, Eve Online, Days Gone, Dredge and the Metro Series. (ꈍᴗꈍ)