Ijen Crater in Indonesia is one of only a few craters in the world where the phenomenon of blue fire occurs, where burning sulfuric gas gives lava a striking blue color. It would be another very bright fiery background like Hell and Infernal Lands, but with a blue color scheme instead.

As this isn't an African location, the most obvious location would be the Gorilla Enclave, either individual or as part of a greater Indonesian set.