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In this episode of The Atlas Obscura Podcast, we bring you a Gastro Obscura classic: Inside a living, breathing collection of sourdough starters in Belgium.

Gastro Obscura: A Food Adventurer’s Guide is a whirlwind tour of the world’s edible wonders is officially out today. Order your copy now!

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.

Karl De Smedt/Used with permission