Not an easy subject to capture, lighting can be very poor, and water often drips from the roof... so give it ago, when you have a good image there is a lot of satisfaction. There are no strict rules, so long as your photo captures a cave.
Every photo submitted will be available for the crowd to rate once the submissions period has ended. You can see all the images uploaded to a contest, but will need to rate them to see how they’re ranked once the rating period begins.
Some contests on Photocrowd also have a judge. After the submission period closes the judge chooses their favourite images and writes some image reviews. The crowd and judge results will be announced on the same day.
For a more detailed explanation of how rating works, see our FAQs