Introduction to Rafflesia Reserve: Tambunan Rafflesia Reserve, Rafflesia is the plant with the largest flowers in the world and only grows in Borneo. In the Rafflesia Reserve, tourists can go deep into the dense forest under the leadership of forest rangers to look for traces of Rafflesia. There are dozens of Rafflesia growing spots in the reserve, and rangers will pay close attention to the growth and lead visitors to the latest blooming locations.