Kaguya's Dimensions

Kaguya's Dimension is an alternate space that seemingly only Kaguya Ōtsutsuki has access to. The dimension was first shown after Kaguya's resurrection. Wishing to not fight on the world that "nurtured" her, she transported both Team 7 and Obito Uchiha to the mysterious world and over a widespread river of lava.

Appearance
Kaguya's dimension is illustrated as a lava-filled wasteland. Most notably, there exists a large volcano that towers over the land. Atop the volcano there is a castle-like construction.