Phú Quốc Prison (Coconut Tree Prison / An Thới)

Phú Quốc Prison (also referred to as Coconut Tree Prison or An Thới) is identified in the source as a military prison on Phú Quốc island in the territory of former South Vietnam. The provided material supplies only the site's identity and alternate names and does not include construction dates, operational timeline, notable incidents, ownership changes, or statements about its present condition. The source excerpt contains no information about paranormal reports, named entities, local folklore related to hauntings, or explanatory theories concerning supernatural activity. Any cultural, memorial, or folkloric significance beyond its identification as a military detention facility is not documented in the available excerpt.