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In page Erfurt:

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Long-distance trails, such as the Gera track and the Radweg Thüringer Städtekette (Thuringian cities trail), connect points of tourist interest. The former runs along the Gera river valley from the Thuringian Forest to the river Unstrut; the latter follows the medieval Via Regia from Eisenach to Altenburg via Gotha, Erfurt, Weimar, and Jena.[citation needed]