Adolla

, also referred to as in another era, is the world from which the Adolla Burst originates.

Overview
Visions caused by the Adolla Link present Adolla as an endless landscape of blackened earth and black flames under a sickly pale-gray sky. Some of these visions feature burning human bones scattered around, while other visions do not show them. Strange structures and large orbiting bodies with eyes can also be present. Sho refers to this realm as another dimension that exists beyond the normal world. Giovanni claims that the Preacher and the insects are both from the Adolla realm. It is implied that the Tear in Space located on the Chinese Peninsula connects both planes of existence together, yet humans are unable to enter it, while the Evangelist emerged from the Tear in Space. According to the Woman In Black, the Evangelist has been showing others visions of Adolla and inspired mankind's ideologies, mythologies, and various religions behind the scenes  and created the modern day's idea of God.

Adolla is home to Doppelgangers, one of which seemingly exist for each human. Spontaneous Human Combustion seems to arise due to the encroachment of a Doppelganger into their human counterpart.

It is the stated goal of the White-Clad on behalf of the Evangelist to use the Adolla Bursts to fully encroach Adolla onto Earth, with the Great Cataclysm being a failed attempt at this. The results of the two worlds overlapping fully are unknown, but presumed to involve the complete burning of the world. However, due to the poorly-understood nature of this other world, it is unknown if this is truly what will happen. According to statements from both Giovanni and Rekka merging Adolla and earth will turn the earth into another sun where only those who possesses ignition abilities will be able to survive while everyone else is burned away.

Trivia

 * The author has used the kanji "異界", meaning spirit world or underworld, to describe Adolla.
 * Other translations include different world or alien world.
 * The image of Adolla as a burning wasteland mirrors images of Hell like that seen in Dante Alighieri's Divine Comedy.