Mine would have to be 

Traverse Town - Kingdom Hearts

Firkraag's Maze - Baldur's Gate

The main hub are - Beyond Citadel

Anor Londo - Dark Souls

Bigcity - Garry's Mod

Cairo Station - Halo 2

The whole game - Peripeteia 

Oil Rig - Splinter Cell

it’d be deepnest (hollow knight) and celestial resort (celeste) for me !!! 

deepnest is not really a fan favourite i would say, considering how… creepy and critter-y it is. but i like it precisely of tht . just bugs clicky clacking around . makes for a good asmr lol

celestial resort … it’s just . idk, you have to play it to really experience it . (or watch a gameplay ) 

some honourable mentions would be the entirety of liyue in genshin impact and penacony in honkai star rail..!

Sky: Children of the light: isle of dawn. a kinda vast and chill place with pretty lavender colors and butterflies throughout! even tho it's not as greenish or lively as other realms, it's still very nice in my eyes.

Skyrim: Whiterun. a very well designed city full of life and interesting people to meet! also the best place to live in all of skyrim.

Babbdi: the house district. the atmosphere of the very tall apartment buildings made of concrete made only for an enormous ammount of silence amuses me a lot. the sheer size of place, yet it only houses a very small number of people.

Laika: aged through blood: where all was lost. an incredibly sad place to visit knowing it's history. however it houses most of the memories the main character has of her life outside of constant conflict. yet also the place where her more painful memories reside.

Night in the woods: the bridge. not only does it house an incredibly rad opossum (his name is rabies), but also its an incredible view of the landscape colors that shine brightly compared to other areas.

rly cool places.

The Factory of a Better Tomorrow (LittleBigPlanet 2)

Sanctuary Fortress (Metroid Prime 2)

Twilight River (Pikmin 3)

Mount Volbono (Super Mario Odyssey)

Anywhere (Rain World)

The Gate - Super Mario Galaxy I don't endorse the 2nd re-release, but that's personal and shouldn't stop you from playing the game how you want.

Beautiful tutorial planet with some amazing music. There is a reason someone made a video about it.

The Well - Animal Well

I know the whole game takes place in the well but I don't care. It's all good.

Shakan - Shin Megami Tensei 5: Vengeance

I have no idea why Angles guard a maze of gravity puzzles, but gosh the halls are pretty and music is ethereal.

The Red Desert - Narita Boy

Amazing music and fun local to explore and learn some lore. Yep, that's going here.

Twilight Theater - Pseudoregalia

Peak platforming and great music. I couldn't forget even if I tried.

Crystal Abyss - Sonic Robo Blast 2 Kart

Really hard map to do time trials on, but it's the only map I wanted to time trial for all the challenge it offers. Plus it has some neat Drift City music.

Lemoyne - RDR2

Star World - Super Mario World

Shadow Moses - Metal Gear Solid

The Big Shell - Metal Gear Solid 2

OKB Zero - Metal Gear Solid V

Lakeview Hotel - Silent Hill 2

Mt. Silver - Pokemon Heartgold