La Limonada–the slum we filmed in in Guatemala City–is more than 60,000 people crammed into a one-mile long ravine. Steep, wooded ravines are not ideal places to live, that’s why the place was available for squatters back in the day. The community continued to grow to its present state, with Guatemala City growing all around it.  We spent a week in La Limonada, getting to know Selma and Tania, the women you’ll meet when you watch “The Fourth World.”