If You Can You Squeeze Through an 8.5 x 24-Inch Opening, You Can Take the Spelunking Tour at Jewel Cave National Monument
South Dakota’s Jewel Cave National Monument, which celebrates its 101st birthday today, offers convenient access to underground beauty and the world’s second longest cave system. While it hasn’t always been easy for the public to enjoy Jewel’s scenic wonders, visitors today have three great tours to choose from. Be prepared for a tight squeeze if you choose the Spelunking Tour.