Cuarto Real de Santo Domingo is an earlier palace built by the Alhambra, but the remaining intact parts are few, and the scale itself is smaller than the Alhambra.
I have been to the Alhambra and thought of course I would feel that there is nothing special here. In fact, the places that can be visited are very small, but the Qubba (reception hall) inside is exactly the same style as the Alhambra, and the tiles are still well preserved, which is a surprise in terms of free attractions.
This year the city government has done a lot of effort in conservation. You can scan the QR code to see the introduction of each attraction (but there should be no Chinese). Upstairs is the exhibition hall for short-term exhibitions.
When I visited, it happened to be an old photo exhibition of Granada in the 1950s. They were all aerial photos, and I could see many familiar sights, such as Granada Cathedral and the bullring.