Formal:
* Красивый город (krasivy gorod): This is the most literal translation, meaning "beautiful city". It's suitable for most situations.
* Прекрасный город (prekrasny gorod): This translates to "wonderful city" and emphasizes the beauty and grandeur of the city.
* Великолепный город (velikolepny gorod): This means "magnificent city" and conveys a sense of awe and admiration.
Informal:
* Красивый город (krasivy gorod): This is also used informally, but it can be made more casual by adding an adjective like "милый" (mily) meaning "cute" or "любимый" (lyubimy) meaning "favorite" e.g. "милый город" (mily gorod) or "любимый город" (lyubimy gorod).
Poetic:
* Прекрасный город (prekrasny gorod): This can also be used poetically, as it emphasizes the beauty and grace of the city.
* Волшебный город (volshebny gorod): This means "magical city" and conveys a sense of enchantment and wonder.
The best way to choose the right phrase depends on the specific situation and the feeling you want to express.