City Usti nad Labem. After exploring the castle Vetruse, which is located on the top of the Orehovka hill, you can walk along the forest hiking trail into the depths of the hill to the observation deck, which overlooks the old Strekov castle. On the way, we will definitely meet the monument to the teacher and founder of the Gebirgsverein tourist club Aussig Karl Eichler (1854-1909).