In this June 22, 2016 photo, butterflies congregate on the shore of the Igarape Mapi River near the community of Ceu do Mapia, in Amazonas state, Brazil. The butterflies gather attracted by the minerals that accumulate on the sandy shore. Ceu do Mapia revolves around an ancient psychedelic tea locals know as the Holy Daime. The Ayahuasca brew is sacred to Ceu do Mapia villagers, who use it in rituals that blend together Indian beliefs with Roman Catholicism. (AP Photo/Eraldo Peres)

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