Before Tanjung Pau village disappeared under the reservoir of Kotopanjang Dam, the ethnic Minangkabau who lived in that remote corner of central Sumatra, Indonesia, once held an elaborate ceremony for 2-month-old babies. “It was called Turun Mandi,” villager Iswadi Abdulla Salim explains. “Everyone would come to see the family bathe the baby in the Mahat River. This was supposed to give protection and allowed the baby to be brought into public for the first time.”