Great steam train ride: Museumsbahn Wutachtal from Blumberg to Weizen (on the Swiss border). Called "Sauschwänzlebahn "=Sow's tail railway because it curves back on itself. Quite amazing (model in the museum makes it clearer).
here is more information the history but there is no any connection to HATO mentioned - http://www.wutachtalbahn.de/b_domain_wtb/sauschwaenzlebahn/wutachtalbahn.php
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