Added to the current 220km, Optymistychna, also known as Optimisticeskaja after the Russian spelling of its name, is now more than 270km long, taking the distinction of the world second longest cave from the Jewel Cave in South Dakota. Only the Mammoth Cave in Kentucky is bigger.
Full article is at: http://www.sofiaecho.com/article/bulgarians-mapping-europe-s-biggest-cave/id_29278/catid_70 _______________________________________________ NMCAVER mailing list [email protected] http://caver.net/mailman/listinfo/nmcaver_caver.net
