National Geographic : 1936 Dec
rnotograpn Dyn.Uj. watson NATURE BUILT SUBWAYS FOR CANOES 300 FEET BENEATH NULLARBOR PLAIN Dissolving the limestone of the treeless, streamless plateau, rainwater sinks into a network of subterranean caverns and channels. Toreach thislake near Eucla, Western Australia, the photographer's party carried their canoe 1,500 feet along a sloping gallery. A former explorer was atfirst driven outbyapocket offoul air,but returned next day to find the atmosphere purified. So clear is the still, deep water that every pebble on the bottom is visible bylamplight.