I was just helping @Mongobongo with his great effort to organise and reward Overgrow Photo of the Month (#potm) and realized that this could make life easier for more members.
You can put photos directly into the poll and create a survey where people can vote for the best photo.
This is example code:
[poll type=regular]
* 
* 
* 
[/poll]
For this to work, you need to find proper identifier of photos you want to insert. That is the 2u570X7kQiPJQaJD1Bd8MLDHDNB.jpeg part in code  above. Unique identifier is assigned to each photo during upload to our server.
You can easily find identifiers for your own photos, because they have been put directly into your post when the upload finished.
Another way to find out photo’s identifier is to look up the photo in the topic, then open the composer by hitting New Reply. Then select the photo with your mouse cursor and hit Quote (you can select whole text but at least the photo). It will show you the code in the quoted text in composer and then you can copy it and paste it properly into the poll according to example above…
Then just adjust 25% part in the code makes it small thumbnail.
You can even accompany the photo with a text description:
[poll type=regular]
* Cat: a small domesticated carnivorous mammal with soft fur, a short snout, and retractile claws.
* Dog: a domesticated carnivorous mammal that typically has a long snout, an acute sense of smell, and a barking, howling, or whining voice.
* Fish: a limbless cold-blooded vertebrate animal with gills and fins and living wholly in water.
[/poll]