Phang Nga Bay is a 400 km² bay in the Andaman Sea between the island of Phuket and the mainland of the Malay peninsula of southern Thailand. Since 1981 a big part of the bay is protected as the Ao Phang Nga National Park. It is situated in Phang Nga Province, at 08°17'N 098°36'E. Limestone cliffs with caves, collapsed cave systems and archaeological sites are found about Phang Nga Bay. Some 10,000 years ago, when sea levels were lower, one could walk from Phuket and Krabi.