River Styx, a partly subterranean waterway, emerges onto the surface in Mammoth Cave National Park, Kentucky by Huw Williams (2007)
#kentucky #mammothcavenationalpark #nps #photography #cave #uploads
River Styx, a partly subterranean waterway, emerges onto the surface in Mammoth Cave National Park, Kentucky by Huw Williams (2007)
#kentucky #mammothcavenationalpark #nps #photography #cave #uploads