You have one song. What can you do in that time? What can you explore? Its up to you what you do during your final song! Remember though, every song must end.
This is a screenshot ingame of 'One Final Song'.
This screenshot shows the vast forest ahead, with the beach behind the player, the desert to the right, and the city in ruins to the left. On the far side of the map beyond the players view is a large mountain range.