Southeastern tunnel entrance of the tunnel near Cotta.
It was built in 1893/1894 to connect a quarry to the railway to Pirna. 
Since 1963 it is out of service, and difficult to find because both 
entrances are hidden in the forest. As you can see it is closed today.
2001-07-08.
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photo: <a href="mailto:tbk@uncia.de">tobias b köhler</a>