Bosnian explorer and archaeologist Dr Sam Osmanagich is best-known for his extraordinary – if sometimes challenged – work with uncovering and exploring what he believes to be a complex of buried pyramids in central Bosnia-Herzegovina. Here, Sam lays down the background to the importance of his claimed find by looking at the many other fascinating different kinds of pyramids around the world from different eras, far beyond the ones we usually hear about. Recorded at the Glastonbury Symposium, July 2023.