My first answer is that you're too late- even when I was last there three years ago, most of the stuff I'd seen in other's photographs was beyond photography IMO and new communities of boxlike housing were springing up driven I imagine my low land prices. That said the best of what there is is I guess round Desert Shores and Salton City on the west side, around Bombay Beach on the east side and theres the odd thing round Calipatria and Niland on the south shore. A decent view from round red island on the shore near Calipatria.
The thing that absolutely is worth photographing round there is Salvation Mountain, a hand-made and brightly painted adobe "mountain" just east of Niland - on Beal Road IIRC. No matter how well travelled you may be, I wouldn't expect that you've seen anything like this before.