The Black Hills of South Dakota are home to not one but two of the world’s longest cave systems. Both in the National Park system, Jewel Cave National Monument and Wind Cave National Park are must-see destinations.   Located just 20 minutes away from each other, these two caves are different in so many ways. One features the world’s largest concentration of rare boxwork formations and the other glitters and sparkles with calcite crystals.   In this episode, we talk about what makes each cave unique, how they were discovered and developed more than a hundred years ago, and some important things to know before you go.   The best way to support our podcast is to become a member of our Patreon account. Follow this link to check it out.   And don’t forget to check out our new online merch store and www.dirtlander.com.   Subscribe to The Dear Bob and Sue Podcast on Apple Podcasts, Spotify, or wherever you like to listen, and if you’ve enjoyed our show, please leave us a review or rating on Apple Podcasts. Five-star ratings help other listeners find our show.   Follow us on Instagram at @mattandkarensmith, on Twitter at @mattandkaren, on Facebook at dearbobands, or check out our blog at www.mattandkaren.com.   To advertise on The Dear Bob and Sue Podcast, email us at [email protected].   Learn more about your ad choices. Visit megaphone.fm/adchoices