The Imaginarium of Doctor Parnassus star recently visited the Nai Soi camp in Mae Hong Son, north Thailand, in her role as a Christian Aid ambassador.
Cole spent time talking to young women about their situation and admits she was shocked to learn some of the camp's residents have lived there for more than 20 years.
She says, "It's a difficult idea to get my head around. It's been one of the most moving trips of my life.
"The camps offer a refuge for people who have nowhere else to feel safe and secure."