German hostages freed in Turkey
The tourists were seized from their camp on Mount Ararat in Turkey's eastern Agri province on 9 July.
The PKK vowed not to release them unless Germany renounced its crackdown on the group, defined as a terrorist organisation by the US, EU and Turkey.
The Germans were part of a 13-member climbing team that had set up camp at 3,200m (10,500ft) on the mountain, the highest in Turkey and a popular tourist destination.
The PKK seeks autonomy for Kurds in south-eastern Turkey. More than 30,000 people have been killed since the group began its armed campaign in 1984.