Hisaronu Bay is located west of central Marmaris, on the Aegean Sea coast, and is considered one of the longest and most navigable bays in this area. Its shoreline is deeply indented: small coves, headlands, waterside settlements, and sheltered anchorages alternate here. Thanks to this terrain, the water area remains relatively calm in many places even in windy weather.

The bay area is known primarily for boat trips, sailing, and routes for yachts and gulets. Tourists come here not only for swimming, but also for the changing scenery: as you move along the coast, pine-covered slopes, rocky stretches, small beaches, and quiet coastal villages come into view. Compared with the lively waterfront in central Marmaris, there is usually less noise and dense development here.

The name Hisaronu is associated with the Turkish word hisar - "fortress," so it is usually translated as "by the fortress" or "in front of the fortress." Along the shores and in the surrounding area, there are ruins and remains of old fortifications, reminding visitors of the long history of this coast, which for centuries was used as a convenient natural harbor. Today, the bay is of interest to those who want to see Marmaris beyond the city center and spend time by the water in a calmer setting.