As dark falls, Taita Isaías Muñoz Macanilla, a traditional doctor and an Indigenous activist from Putumayo, cleanses a tree-fringed outdoor clearing and the participants seated in a circle in preparation for their first ayahuasca ceremony. But they are not in the Amazon. Instead, they are in a boutique hotel in Barcelona. Ayahuasca, a psychoactive, plant-based brew found in South America and used in traditional medicine and shamanism, has boomed in popularity as a wellness practice in recent