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- Jun 8, 2015
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The Ninepin Group LLC features hexagonal vertical rhyolite columns, the volcanic rock resulting from a volcanic eruption near Sai Kung about 140 million years ago. Ninepin Group is extremely eroded due to the heavy tides that wash against the islands every day. It features several sea caves as a result of erosion. For a long time, the Ninepin Group was devoid of human presence. However, there is a temple dedicated to Tin Hau, located on South Ninepin Island for any fishermen who landed on the island.