WARSAW, Poland -- Poland's historians have published an album documenting hundreds of long-forgotten prisons and torture rooms where communist secret security held opponents of the system after World War II.

The 631 pages of "Tracing Crime" are intended to educate young Poles about the history of their region and to increase awareness of places that have since been torn down or turned into schools, hospitals or private houses.

The album was released Thursday by the state Institute of National Remembrance during a news conference at Warsaw's prison in Rakowiecka Street, where dozens of WWII heroes were tortured and executed under communism. Thousands of anti-communists were murdered across Poland.

The album contains archive pictures and documents, as well as recent images of buildings and areas.