There was once a comic that didn't even bother to design something: the author took a photo of Florence, made it monochrome and called it a day.
It was something about a saintess being exiled, but I don't remember the title.
I believe One Piece is considered a fitting Fantasy Manga... Hmmm... Water Seven, Dressrosa, and the Flower Capital in Wano will always stick out to me! Water Seven Especially, it's beautiful!
Now I do know One Piece bares a weird blend of fantasy and modern aspects, But, I still consider it fantasy