This photo was taken in the Conway National Park in Queensland, Australia. Would anyone know what this is?
The plant in your photo is not an orchid (which is a monocot group with a distinctive fused anter/stigma structure called a column). The plant in your photo is a member of the genus Passiflora or Passion fruit. There are many species of this genus distributed in tropical regions around the world. The following characteristics identify it as a species of the genus Passiflora:
-The plant appears to be a vine with tri-lobed leaves having reticular veins.
-A tri-lobed stigma arising from a superior ovary.
-The five anthers (difficult to see all five) just below the ovary.
-There are visible corona filaments seen just above the petals below.
The flower in the photo appears to be old and somewhat dried/distorted, but all of the distinctive Passion fruit flower elements are present. Here are some external links that may be helpful.
This is an orchide of the Philiphines: