Jwacheon Cave in Busan is a historical cave near Jwacheon Station on Subway Line 1, believed to have been developed as an air-raid shelter during the Japanese colonial period. Inside, photographs and cave explanations show the lives of Jwacheon residents from the Japanese colonial period through the Korean War to the present, and entry is free. Searching for Busan Seongsan Church makes the cave entrance easy to find, and looking around the inside takes less than 10 minutes. The cave is short in length, so its scale is small.