One family’s regular day of exploring some sand dunes at the edge of Lake Michigan turned into a wild tale of a little boy being sucked into a sinkhole, and the discovery of underground tunnels.READ MORE IN THE ATLAS: <a href="https://www.atlasobscura.com/places/mysterious-sinkholes-of-mt-baldy" target="_blank">https://www.atlasobscura.com/places/mysterious-sinkholes-of-mt-baldy</a>

Arthurdale

An audio guide to the world’s strange, incredible, and wondrous places. Co-founder Dylan Thuras and a neighborhood of Atlas Obscura reporters explore a new wonder every day, Monday through Thursday. In under 15 minutes, they’ll take you to an incredible place, and along the way, you’ll meet some fascinating people and hear their stories. Our theme and end credit music is composed by Sam Tyndall.