I have 2.

1. Majula in Dark Souls 2
2. Blackreach in Skyrim. Just getting there is immensely satisfying and it's so beautiful.

Shrine of Seven Stars in WoW.

Mine is the tournament boss level from path of exile. Can't remember the name of the boss but the whole level has this epic music and feel to it

Fallout 2's Enclave oil rig (Poseidon?) is pretty cool. I like how the guys who built the original oil rig put spooky faces on the big pipes, really shows an appreciation to their craft.

Outside of whiterun with some graphics mods in skyrim. It's pretty. The night sky and foliage is really nice. Not much of a gamer anymore but I habitually return to skyrim.

Limgrave in Elden Ring because you open to door from the intro cave and you are "holy shit".

The All-Star Rest Area in Super Smash Bros Brawl. Extremely calming and oddly serene. Giving the player time to catch a breath between the breakneck All-Star fights. Stay as long as you want, and the music was very nice.

The "Bubble-Blowing Baby Hunt" level in the SpongeBob movie game. The music fits, it's not too hard to run through, and Patrick's moveset is so much better than in the previous game.

I still boot up The Secret World once in a while to hang out in their besieged farmlands area.

The whole game has great creepy places.

This place in bloodborne Although the whole fishing hamlet has a special place in my heart, from when i ised to read cosmic horror to fall asleep as a kid.

Il Mheg from FF14. Honorable mention to the Coral Highlands from MHW.

The Floating Magical Kingdom of Zeal from 12,000 BC in Chrono Trigger. They could achieve almost anything, but their greed, prejudice, and arrogance doomed them to a terrible fate that nearly killed all of humanity.

Great music - https://youtu.be/BXo3DrXHY8w Amazing art, writing, and aesthetic design. - https://chrono.fandom.com/wiki/Zeal

Good question. I like Beach Bowl Galaxy in Super Mario Galaxy a lot. Love the tropical/beach setting combined with the space theme. I bet it would be awesome to lay on a cozy little beach that’s inside a big orb floating through space. Doesn’t get more relaxing than that.