Rafflesia arnoldii is found only in the rainforests of Benkulu, Sumatra Island, Indonesia and Malaysia. It’s the largest single flower on earth, and grows as a parasite on a particular species of vine, wrapping thread-like strands of tissue around its host in order to bleed it of water and nutrients.
I saw this in the midst of channel surfing the other day. I only watched it for ten seconds or so but I figured I'd look it up later.
More pics and info here: