No-one knows what became of them, but today Japan and Korea are still arguing over "ownership" of the three magic mountains, each claiming them as its own.
秦始皇遣韓終、徐福出海求仙，不知所終，今天日本、韓國還在爭奪蓬萊三神山的「歸屬」權，都說在自己國度。