Saga is located in the northwestern part of Kyushu. The shoreline of the Higashi-Matsu-ura-hanto Peninsula facing the Sea of Genkai is a saw-toothed coast with many outlying islets sitting in the offing. In the prefecture are many nature-rich places to visit, such as Niji-no-matsubara (Rainbow Pine Grove) with a Japanese black pine forest arcing five kilometers from east to west along Karatsu Bay. Nanatsu-gama, known for a row of sea-eroded caverns created by the raging waves of the Sea of Genkai, is another place worth visiting.