My favorite podcast of all times and by the way a great podcast for learning Spanish: Radio Ambulante
A great team of journalists tell unique stories in all the different dialects spoken all over Latin America So its also great way of getting to know these dialects, the different countries and cultures and of course for training your listening comprehension
They offer also a great feature for intermediate Spanish learners: Lupa, a mobile app for Radio Ambulante listeners aimed to help Spanish learners to become more fluent.
And if you are more into news podcasts El hilo is a new narrative podcast from Radio Ambulante, covering the most important news from Latin America and the world.