Paraelemental Plane of Sun
The Paraelemental Plane of Sun is an Inner Plane formed between the Elemental Planes of Air and Fire. Elemental Fire's flames mesh with the sky of air create a plane of eternal sun. Paraelemental beasts from this plane are some of its few known natives.
In most Dungeons and Dragons campaign worlds, the Paraelemental Plane of Smoke is between Air and Fire.