About the cave DD4 is a streamway cave in western Victoria, close to the South Australian border. Unlike the crystal clear sinkholes of Mt Gambier DD4 is a small stream winding its way through limestone…and lots and lots of mud. There is a lot of walking passage through the cave, as well as a lot of areas where rockfall leaves you climbing over or under. And then there’s the mud. Lots of it. About the trip We visited DD4 for a reason – to follow up on sump exploration there from several years ago. Agnes Milowka put nearly 70m of line into the terminal sump of the cave and reported that it continued. It seemed about time to see how [read more…]