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In this episode of The Atlas Obscura Podcast, we learn how one family’s 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.

Our podcast is an audio guide to the world’s wondrous, awe-inspiring, strange places. In under 15 minutes, we’ll take you to an incredible site, and along the way you’ll meet some fascinating people and hear their stories. Join us daily, Monday through Thursday, to explore a new wonder with cofounder Dylan Thuras and a neighborhood of Atlas Obscura reporters.

K. George, National Park Service/Public Domain