The area around Iso Station has the lowest point of watershed in Honshu which devides Pacific Ocean and the Sea of Japan (the fields around this area are watershed rice fields) and the railway reaches Fukuchiyama Station on the Yura-gawa River, which flows into the Sea of Japan, seemingly oblivious to the fact that a train is running amid the scenery of rice fields.
石生駅周辺は太平洋と日本海を分ける分水嶺の高度が本州で最も低い所（この辺りでは分水田圃）であり、田圃の中を走っているうちにいつの間にか日本海へ注ぐ由良川沿いの福知山駅に到着する。