Great choice with the Travertine, my joey just renovated her pool area with it and it looks amazing. I agree with Jenny Torrisi that glass in the archways would make a huge difference. Synthetic turf would be one idea for the courtyard, but it does have to be properly laid. Otherwise if you could extend the Travertine to that area, it would also look amazing. It would contrast well with the plants you have there, and you could add a cantilevered umbrella and couple of large shiny blue pots would add some colour and extra greenery. My big concern though is with those palm trees - quite frankly I find them useless, they provide very little shade, no greenery at ground level and the fonds drop off them indiscriminately and can cause serious injury if someone is in the wrong place when they drop. Lower growing plants in that area would make a huge difference. There used to be a market for established palm trees, not sure if it still applies. As far as the brickwork goes, dark coloured bricks absorb heat, which would make your pool area very hot and the solid walls would do nothing to allow breezes to circulate. I am really anti painting or rendering bricks as that means ongoing maintenance, but would the budget run to cladding the fence at least in a light coloured timber, I think it would give it a more modern look and appear cooler. There is definitely no room for plants, even in pots, but if you are artistic or know anyone who is, you could also attach a waterproof sheeting to one wall and paint a tropical style mural on it. https://www.google.com.au/search?q=tropical+external+wall+murals&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjns-ih0IHQAhVGjZQKHdBHAnkQsAQIQw&biw=1366&bih=638

After seeing your before/after photos in your [kitchen thread[(https://www.houzz.com.au/discussions/kitchen-reno-ideas-suggestions-please-dsvw-vd~3651370?n=11) I thought I'd bump this thread. I have a better idea of the whole space now. Have you had any more ideas of what to do? I think by cladding the whole surround and wall above could have big impact and modernise so it ties in with your new kitchen. Also give some balance as it sits alongside the glossy black bench. If you like the warm of timber, you could clad running the wood horizontally. This final photo is cataloged as a transitional look but same idea with cladding all the way up. ETA: That artwork would look great on a dark grey backdrop.

I'm not a huge fan of the teal tiles. I would pick up a beautiful neutral travertine and some natural stone that highlights the white and pulls in the yellow timber tones to form the pool edge. Timber walls are stunning, but it requires a lot of maintenance and the commitment to keep it looking pristine. It is easier to colour block with a deep accent colour like grey or rich brown and use architectural features like pillars, shadowboxes or the frames as previously mentioned. It is also well worth getting a lighting designer to come in and help you think about how to create more drama and functional lighting for your pool.

In all seriousness, I have a couple of artificial plants at home - look good but have to be dusted regularly and not easy or quick to dust properly - having a whole wall of artificial plants would drive me completely insane!