chest: box-shaped type of furniture

group of humans: any set of human beings

cargo ship: ship that carries cargo, goods, and materials onboard from one port to another

river: larger natural watercourse

Porto Velho: the capital of the Brazilian state of Rondônia, in the upper Amazon River basin

wharf: structure on the shore of a harbor or on the bank of a river or canal where ships dock

Madeira River: river in Bolivia and Brazil