The Postojna Cave ranks alongside such famous karst caves as Mammoth Cave in Kentucky, U.S.A., and the Reed Flute Cave of Kuei - lin, China.
Gua Postojna dapat disejajarkan dengan gua - gua karst terkenal seperti Gua Mammoth di Kentucky, AS, dan Gua Suling Buluh di Kuei - lin, Cina.