Sunken fire pit with seating. While this is a neat idea, I would be hesitant about how rain would affect this area. Definitely would need to put in a drain somewhere or have it open up to the rest of the yard.
Fantastic small space. I love the kadai fire bowl with L framed comfortable seating, offset by the change in floor material. Mirror works very well in expanding the space, and colours feel clean yet have a warming character.