National Geographic : 1936 Dec
SUNNY CORNERS OF KANGAROO LAND V iN atlonal uLeograpnic society rinlay rnotograpn oy vv. _ oDert ivioore IN AGES PAST A RIVER CARVED GRAND ARCH AT JENOLAN CAVES Entering this natural tunnel, the motor road passes through a barrier of soluble limestone spanning a valley. From the walls of the arch, narrow passages lead to the grottoes of this underground wonder land, about 115 miles from Sydney. Delicately colored pink, white, and brown limestone formations fill the caverns with fantastic castles, people, trees, and birds.