Explore details about location 国道21号線 (Route 21). 国道21号線 (Route 21) is a location situated within the 岐阜市 alongside other areas such as 高富街道, 岐阜県道岐阜環状線, 岐阜環状線. Additionally, some smaller parts of 国道21号線 (Route 21) include specific areas like 岐阜羽島線, 岐阜垂井線 adding to the diversity of its landscape.