I'm having a very wild guess here

and think that the plant in your photo, might be an Aristolochia Grandiflora, which is not only one of the Worlds largest climbing plants, but also one that has the largest flower and think it might also be known as a Pelican Flower.
The Aristolochia originates from the Caribbean and was introduced into The States to attract butterflies, and although it looks absolutely stunning when in flower, it smells disgusting close up, and is renowned for having the most unpleasant odor, which is described as - something similar to that of rotting flesh

So if the flower in your photo, when standing next to it - made you gag, it may well be an Aristolochia
