Riau is an Indonesian province on the central eastern coast of Sumatra, facing the Strait of Malacca. Hilly Pelalawan regency is a vast area that\'s home to rivers, forests and palm oil plantations. Sumatran tigers and elephants roam the rainforest-covered Tesso Nilo National Park. To its northwest, the ancient ruins of the Buddhist Muara Takus brick temple complex sit in a jungle clearing by the Kampar Kanan River.