Hollow Bastion

Hollow Bastion is a world that appears in Kingdom Hearts, Kingdom Hearts Chain of Memories, Kingdom Hearts II, Kingdom Hearts coded, Kingdom Hearts Birth by Sleep, Kingdom Hearts 3D: Dream Drop Distance, Kingdom Hearts III, and their subsequent remasters.

Kingdom Hearts

 * Castle Gates
 * Entrance Hall
 * Lift Stop
 * Chapel

Kingdom Hearts Chain of Memories

 * Riku's Room

Kingdom Hearts II

 * Ansem's Study

Kingdom Hearts Birth by Sleep

 * Front Doors

Kingdom Hearts coded

 * Data-Riku