We first got curious about Parvati Valley in Himachal Pradesh after we read journalist Kunal Purohit’s piece in the South China Morning Post. One of the more cryptic lines from the piece was relayed by a mountaineer: Nothing that goes into the Parvati ever comes back.

When an online audiobook and podcast service recently released Vanished: Inside India’s Bermuda Triangle written by Purohit and Kaizad Gustad, we were amazed by how a simple piece of reportage can be meticulously broken down into a 12-episode podcast. Vanished, which is the result of a year-long reporting and research exercise, explores why and how Parvati Valley came to earn such a troubling reputation.