From Wikipedia
Far' Falastin (Arabic: فرع فلسطين) is a notorious Syrian prison located near Damascus.
The United States used a process called extraordinary rendition to transport a number of terrorist suspects to Far' Falastin where they were subjected to interrogation that included torture. In addition, the participation of German officials in interrogations in Far' Falastin has been confirmed. It is not known whether these officials were present or participating in cases where torture was applied to prisoners.
From Amnesty International web site
Syria: Legal concern / health concern / fear of torture ...
... After his arrest by Syrian security forces at Damascus airport he was apparently taken to Far’ Falastin (Palestine Branch) detention centre in Damascus. ...
Syria: Fear for safety/'disappearance'/incommunicado detention ...
... He was apparently beaten twice daily from then until October, when he was transferred to the Far’ Falastin (Palestine Branch) military intelligence detention ...
Syria: Syrian-born German held three years without charge in rat ...
... Muhammad Haydar Zammar who has been held in prolonged incommunicado detention in solitary confinement at the Palestine Branch (Far' Falastin) of Military ...
Syria: Fear of torture or other ill-treatment/possible prisoner of ...
He is believed to be still in the custody of Military Intelligence, possibly, according to some reports, at the Far’ Falastin interrogation and detention ...
Syria: Fear of torture or other ill-treatment/possible prisoners ...
... They are now known to have been moved to the Military Intelligence’s Far’ Falastin detention centre in Damascus, which is notorious for torture. ...
From Amnesty International annual report 2009:
The state of emergency, in force since 1963, continued to give security forces sweeping powers of arrest and detention. Freedom of expression and association remained strictly controlled. Hundreds of people were arrested and hundreds of others remained imprisoned for political reasons, including prisoners of conscience and others sentenced after unfair trials. Torture and other ill-treatment were committed with impunity; seven deaths as a result were reported. Military Police were reported to have killed at least 17 detainees. Human rights defenders were harassed and persecuted. Members of the Kurdish minority faced discrimination; many were effectively stateless and denied equal access to social and economic rights. Women were subject to discrimination and gender-based violence. Sixteen civilians were killed in a bomb explosion which state media attributed to an armed group.