Where is android syncing my photo's to?
Your Android phone may sync photos on Google +, Dropbox, Google Drive and Facebook.
 On Google + got to https://plus.google.com/photos/search/%23AutoBackup (Photos> AutoBackup), here are photos whose automatically synced through your android phone. How to Enable/ Disable auto sync on Android

Next is Dropbox, check this article for dropbox sync enabled www.dropbox.com/help/82/en

Next is Google Drive which may auto sync your photos &amp; data to server.

&amp; Facebook is also sync photos in private folder in your albums folder.

But in my opinion your photos are being synced by Google + in Auto Backup section.