If you want to get a 360 view of the coast and surrounding countryside there is no better view than up the Cuglieri mountains to Monte Rassu. It's one of the highest points and was recently badly affected by a huge forest fire in 2021. However, everything is now regrowing and it's a great hike. Hiking boots are recommended.

To get there its https://goo.gl/maps/8X2ifuRLXhMp8XLd6

And here's the GPX file