Here natural gas forced its way through salt water at irregular intervals and would burn brightly, when ignited, for a few minutes or for hours. The Baby Geyser, several hundred yards from the larger spout, burns almost continuously through cold sulphur water. The Flaming Geyser was discovered when prospectors were drilling holes in search of the McKay coal bed. After they had bored to considerable depth, gas began flowing. Failing to locate the coal vein, the investigators pulled out their drill, leaving the sheet iron casing in the hole. Subsequent rusting of the casing allowed water to enter, and under the water, gas accumulated until pressure grew sufficient to make it bubble to the surface. This is now a 480-acre day-use park with more than three miles of freshwater shoreline on the Green River; the “geysers”—methane seeps—are still going. Park activities include whitewater rafting, tubing, and model airplane flying.