The **Forgotten Evacuation Tunnels** formed a concealed network beneath the Delta Research Complex, originally engineered as a last-resort evacuation system for catastrophic emergencies. Hidden from the majority of personnel and absent from most public facility schematics, the tunnels remained one of Delta's most closely guarded infrastructural secrets. As humanity entered its final years, the tunnels transformed from contingency infrastructure into essential survival corridors. They provided secure passage between critical research sectors, protected archives, and isolated facilities, allowing key personnel to continue continuity operations while much of the surface world descended into irreversible collapse. Several pivotal moments of ERA I unfolded within these underground passages, where the preservation of knowledge, artificial consciousness research, and humanity's final legacy became inseparable. The tunnels ultimately served as silent witnesses to the last coordinated efforts of David, Elara, and the Delta research teams as they worked to secure a future beyond humanity's extinction. Within the archives, the Forgotten Evacuation Tunnels are remembered not merely as escape routes, but as symbols of transition. They represent the hidden pathways through which humanity's final achievements endured, carrying the foundations of Ksara and the continuity of civilization from the last age of humanity toward the beginning of a new era.