Olbia was the westernmost city of ancient Pamphylia — a small coastal settlement at the point where the fertile plain of Pamphylia ended and the rocky Lycian coast began. The ruins on the western edge of Antalya are modest: some wall sections and building foundations scattered among the pines near the Konyaaltı beach headland. They are easily missed.
The site is of interest primarily to those who want to walk every edge of the ancient Pamphylian world. Casual visitors would do better to spend the time at Perge or the Antalya Museum. If you are in the area, the viewpoint above Konyaaltı on the road west is worth stopping for.