My grandmother had a great terraced garden when I was a kid. It was going up a slope that ran up the side of her house. I don't know if she put it in or if it was already there though.
Each terrace was like a large stone basin with soil so she could plant whatever she liked. I remember she grouped her plants in each basin, so there were a bunch of bright flowers in one, herbs in another, berries in a third and so on.
I'm not sure if that was because it made them easier to care for, or because she liked the aesthetic or if she was simply organized that way.
I hope one day I'll be able to have terraced garden beds like that.