Wooden sluices filter muck from pits where men stand chest deep blasting away at the sediment with water cannons. Mining at its most basic, cheapest, picturesque, and – for the bold – participatory. At the Banjarbaru roundabout take a green passenger truck southbound to Desa Pumpung (6000Rp, 15 minutes, 7km), then walk 700m south from the main road.