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Perak, Malaysia (4.79165 100.92761)
In 1959, a British artillery officer stationed at an inland army base during the Malayan Emergency discovered Gua Tambun, identified by archaeologists as the largest rock art site in the Malay Peninsula. Most of the paintings are located high above the cave floor, at an elevation of 6–10 metres (20–33 ft). Seashells and coral fragments scattered along the cave floor are evidence that the area was once underwater.