This is depend on lots of thing.
1. No of photos
2. Quality of photos
3. Concept of photos
4. No. of likes on photos
5. No. of views in photos
6. The choosen place where you visit
7. Is this photo or this type of photo already uploaded?
8. Describe of the photo
9. The maximum votes of the team members who will select the winner.
10. Etc. May be you not win but if your photo is good, you will get credit. Sure! Keep petitions. Happy Travel!