February 16, 2006 Jewel Cave now Second Longest in World Jewel Cave explorers have now surveyed 135 miles of cave passages making it the second longest cave in the world. May 06, 2005 National Park Service Requests Comments for Exotic Plant Management Plan May 03, 2005 Jewel Cave National Monument Seeks Public Comment on Cultural Landscape Report Jewel Cave National Monument seeks public comment on Cultural Landscape Report and Environmental Assessment. | 
