When you’re in the mine, the sky is covered by gases. Day and night are confused. You feel suspended in time. Sunarto, 41 years old, carries a load of sulfur out of the Kawah Ijen crater.

Huang Lihong, 31, fell into the Ijen Crater in Banyuwangi, East Java, Indonesia, on April 20 while posing in a picture her husband took.

They risk respiratory illness and death to haul 200-pound loads of sulfur up crater walls. So why do they do it? In this episode of Risky Business, we head to the Ijen volcano to find out.