From hidden catacombs to wild rumors about a hollow earth, the world is full of subterranean stories. But which are total bunk, and which have the ring of truth? Tune in to learn more with Ben and Matt in this week's Classic episode.

Learn more about your ad-choices at https://www.iheartpodcastnetwork.com

They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/

See omnystudio.com/listener for privacy information.