entrance to a beautiful resava cave (resavska pecina) in serbia, massive columns of stalagmites and stalactites

beautiful resava cave serbia massive columns stalagmites stalactites colonnades small tubs pearls bottom morphological hydrographic microclimatic features resavska pecina rough lights wallpapers dripstone environment color rare minerals speleothems jelovac geologist europe surface caves stone nature natural rock landscape wall travel stalactite underground water speleology stalagmite old dark limestone mountain interior inside geology formation tourism colorful jama grotto material entrance