Dimensions: 10.3 x 14.7 cm. (4 x 5.7″)

Publisher/Editor: Snimio I. Vukovic (Photo)

Condition: Postally used, backside written and postmarked. Good condition with some signs of age including surface marks and wear to the paper.

Notes: Postojna Cave (Slovene: Postojnska jama; German: Adelsberger Grotte; Italian: Grotte di Postumia) is a 24,120 m (79,130 ft) long karst cave system near Postojna, southwestern Slovenia. It is the second-longest cave system in the country (following the Migovec System) as well as one of its top tourism sites. The caves were created by the Pivka River. (Wikipedia)