It is Rafflesia arnoldii. This is a rare flower found in the forest of Indonesia. It grows up to 3 feet across and weighs up to 15 pounds!It is a parasitic plant, with no visible leaves, roots, or stems. It attaches itself to a host plant to obtain water and nutrients. When in bloom, the Rafflesia emits a repulsive odor, similar to that of rotting meat. This odor attracts insects that pollinate the plant If you want to see that flower visit here.