Keywords: Postcard of Postojna Cave 1900.jpg Postcard of Postojna Cave 1900 http //www ebay de/itm/Postojna-Postojnska-jama-Adelsberger-Grotte-ca-1900-05-ungelaufen-/252619002646 author PD-Slovenia 1900 postcards of Slovenia Postcards of the interior of Postojna Cave Images from eBay |