It’s an odd name for an odd piece. While the geography may be fictitious, the constructs of heaven and hell provide both a framework and an interpretation for existence inside the bookend events of life and death.
Heaven may not be all it is cracked up to be. It is not exactly the Magic Kingdom.
It is more concerned with order and surveillance than eternal tranquillity. The creatures in the upper left corner stare back. They are angels who have removed their wings and left them to glow at the bottom of the composition. They are not in the image of human. They are something entirely other than us. The red sceptre to the right is the staff of sole authority — the church or some similar agency operating inside the temporal realm. Heaven seems a foreign place in which to spend eternity.
Hell, of course, is a different kettle of fish. Dionysian in nature, it subverts the individual identity into the chaos of souls.
In the end, it is hard to know which is worse.