A locked prison gate inside the Eight-Sided Building at Oasis Village on Green Island, Taitung County. DARK TOURISMA view of the Eight-Sided Building (watching four corridors) in Oasis Village on Taitung County’s Green Island. Photo: Noah Buchan, Taipei TimesTwo decades later, Green Island White Terror Memorial Park (白色恐怖綠島紀念園區) opened the doors to a dark chapter in Taiwan’s authoritarian past. PENAL COLONYA mural of a Republic of China (ROC) soldier fades on a wall topped with razor wire in Oasis Village. It features the engraved names of political prisoners and the dates that the victim was executed or to the years of imprisonment.