Where is Ost?

Ost - Mas Ost - Monte Vidon-Combatte Ost - Vezzola Ost - Modena Cathedral Ost - Catellani Ost - Canolo Ost - Castello della Madonnina Ost - Sala Baganza Ost - La Bassa Ost - Bagnolo in Piano Ost - The Ducal Palace in Parma Ost - Mingarin Ost - Fosdondo Ost - Mordano Ost - Clusane sul Lago Ost - Anne Ost - Ponte della Forca Ost - Mezzanine Ost - Belfiore Ost - Museum of Civilization in Bastille Ost - Jello Ost - Savigny Ost - Mirabello-Chiria Ost - Отель Hotel Restaurant Corsini Ost - Borgo-Malpasso