The true treasure lies in discovering who or what created these tunnels. In 2009, a farmer in the south of Brazil was driving through his corn field when he felt his tractor suddenly sink and lurch to one side, making the vehicle shudder to a halt. When researchers arrived to investigate, they were shocked to find a tunnel running across the field and directly under the farmer's house, with deep claw marks embedded into the walls indicating its previous occupant was not human. A geologist and one of the scientists who visited the farmer's property concluded was the work of a giant ground.
