Jewel Cave National Monument




Located just outside of Custer, South Dakota this cave is sure to captivate you with it’s mystery and beauty.

  • Jewel Cave National Monument is the second longest cave in the world, and new passages are continually being discovered.
  • Located just outside of Custer, South Dakota.
  • A variety of tours cater to visitors of all types.
  • Open year-round with tours leaving through the day.

Named for its sparkling calcite crystals, Jewel Cave National Monument is the second longest cave in the world, behind Kentucky’s Mammoth Cave. With a long history of exploration and tourism, today the cave is visited by avid cavers, speleo-neophytes and curious tourists hoping to see the stunning stalactites and -gmites, frostwork, calcite crystals, gypsum needles, hydromagnesite balloons and other speleothems.