除了十二门徒岩外，观赏海中石柱的最佳地点当属群岛湾 (Bay of Islands)。游客在这里可以近距离欣赏石灰岩石柱，连石灰岩被雨水侵蚀出的空隙都看得一清二楚。
群岛湾位于坎贝尔港国家公园西端，距离坎贝尔港 18 公里左右。这里也是大洋路由东向西从海边转向内陆的分界线。由此沿着大洋路西行，海边的灌木丛将被广大的奶牛牧场所取代 – 这里也是澳大利亚奶业最集中的地区。
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Great Ocean Road Regional Tourism acknowledges the Traditional Custodians of the Great Ocean Road region the Wadawurrung, Eastern Maar & Gunditjmara. We pay our respects to their Elders, past, present and emerging. We recognise and respect their unique cultural heritage and the connection to their traditional lands. We commit to building genuine and lasting partnerships that recognise, embrace and support the spirit of reconciliation, working towards self-determination, equity of outcomes and an equal voice for Australia’s first people.