I am researching the Burn. If you find more information, could you let me know? I will add more description.
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The Burn
The Burn is a location in Hydelin and a dungeon in the upcoming patch 4.4. On the world map, it is located southwest from Azim Steppe. The Burn is depicted as a crator and a giant worm is present. This location turned into a permanently burned out area because of the overuse of aether. Currently, it is completely covered with white ashes. A large amount of aether must be consumed in order to summon primals.
Reference
Producer Live Letters 45
Encyclopedia Eorzea
World Map