We boarded the boat once again to head down the Amazon river to visit a shaman and his medicinal garden. After explaining some of the ways he treats the local population, the shaman took us on a tour of the garden, explaining each of the plants and trees, and how they are used. Some of the plants he showed us are actually being studied and used by big pharmaceutical companies. Of the featured trees were two giant ficus trees known as the "married couple". We were told the rub the leaves of one shrub on our palms, only to realize later that a dye was released, that can take days to wash off.