It's in the process of being archived and is not yet complete.
If you have a spare sever and bandwidth somewhere, you can set up an ArchiveTeam Warrior. They exist as VM images and docker configurations. I've set up a docker instance of their Archive Team's archive warrior (http://www.archiveteam.org/index.php?title=ArchiveTeam_Warri...) and it's currently ploughing its way through the remaining parts of Panoramio which are missing.