Everyone knows there are few worse feelings than jumping on a 15-hour flight, starting a long hike, or wandering through cobblestone streets solo and reaching for your earbuds, just to realize that you’ve left them behind.

But what’s just as important as your headphones? What’s being broadcast through them. While music may be the typical go-to, the same old playlists get stale quickly—so serious travelers need to start stepping up their entertainment game, in the form of podcasts. And these are the top six series every traveler should have in his or her back pocket.