La Tha Pii

Ghost Game Thai or LaThaPii is a 2006 Thai horror film aboutcontestants on a reality TV show who must stay in an abandoned military prison where atrocities took place years before.

The film was controversial because the setting closely matched that of Tuol Sleng Genocide Museum, where the Khmer Rouge in Thailands neighbor, Cambodia, tortured prisoners.In the film, the prison was called S11, which closely resembles the name the Khmer Rouge used for Tuol Sleng, S21. It also depicts piles of skulls and bones, similar to many war memorials around Cambodia. ........

Source: Wikipedia