Symbolla as I recall is up and over the dolphin-free roundabout, about half way up between that junction and the next roundabout, turn left and it's about 50 metres in. Good location. I have a feeling Opal is in the area of Diamond apartments so right at the roundabout of the latter day dolphins and take about the 3rd right and up about 100 metres. Again, decent location for the centre and prom.