Ngọc Trời Prison
| Ngọc Trời Prison | |
|---|---|
| Military prison and concentration camp | |
 Aerial view of Ngọc Trời Camp, taken circa 2002 | |
| Other names | Ngọc Trời Island Detention Facility |
| Location | Ngọc Trời Island, Sơn Hà |
| Built by | Military Directorate of Sơn Hà |
| Operated by | Military Directorate of Sơn Hà |
| Original use | Re-education camp |
| First built | 1992 |
| Operational | 1998–present |
| Inmates | Political enemies, prisoners of conscience, convicted criminals |
| Number of inmates | Estimated 50,000 |
| Killed | Estimated over 100,000 |
Ngọc Trời Prison (Daoan: Nhà tù Ngọc Trời), officially administered by the Military Directorate of Sonha, is a military prison located on Ngọc Trời Island, an isolated landmass off the coast of eastern Sonha. This facility is notorious for its dual purpose, serving as a high-security detention center for convicted criminals and functioning as a de facto concentration camp for political enemies and prisoners of conscience. It was only discovered in recent years that the ONI of Daobac rumors of unethical human experimentations are also conducted on the prisoners. In light of the rumors, more evidences of mistreatment, rape, and torture were uncovered, leading to wide condemnation of the facility.
According to Sonha published documents, the prison was established in 1992 by order of the Military Directorate as part of a broader campaign to suppress anti-Directorate agitators and enforce ideological conformity during a period of heightened political tension in Sonha after the civil war. Initially conceived as a detention center and re-education camp for high-profile criminals and deserters, the prison quickly evolved into a hub for incarcerating political dissidents, intellectuals, and individuals labeled as threats to the Directorate’s constructivist revolution. The isolated location of Ngọc Trời Island was chosen to prevent escape and to limit public knowledge of the prison's conditions. Over time, the facility expanded, with additional barracks, labor camps, and reeducation centers constructed to accommodate its growing population of inmates.
