archive.org/web/20161022034807/http://www.panoramio.com/user/969909?with_photo_id=55867069 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161015142514/http://www.panoramio.com/user/4645711?with_photo_id=38910713 operator: Panoramio described at URL: https://web.archive...
mouth) at Zeche Nachtigall, Dünkelberg quarry in Witten (Germany) German Eingang des Nachtigallstollens im Steinbruch Dünkelberg (Muttental), Witten object...
English operator: Panoramio described at URL: https://web.archive.org/web/20161012095934/http://www.panoramio.com/photo/4085580...
archive.org/web/20161020145804/http://www.panoramio.com/user/4678999?with_photo_id=59805727 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161021102435/http://www.panoramio.com/user/4645711?with_photo_id=54325533 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161012114737/http://www.panoramio.com/user/2742393?with_photo_id=18751464 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161020221446/http://www.panoramio.com/user/969909?with_photo_id=57520940 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161020190921/http://www.panoramio.com/user/969909?with_photo_id=53876697 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161029034333/http://www.panoramio.com/user/969909?with_photo_id=93277242 operator: Panoramio described at URL: https://web.archive...
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.jpg){kind=link}
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