Explore details about location 岩内洞爺線. 岩内洞爺線 is a location situated within the 岩内町 alongside other areas such as 北海道道270号岩内港線 (Iwanai port line), 岩内洞爺線. Additionally, some smaller parts of 岩内洞爺線 include specific areas like 野束清住線, 国道229号 adding to the diversity of its landscape.