Hard 16
It looks like some pretty heavy hints have been added to the game, so I guess this blog is obsolete now. Alas
Solution:

seen from Poland
seen from Russia
seen from Belgium
seen from Türkiye

seen from United States
seen from United States
seen from Yemen

seen from Türkiye
seen from Yemen
seen from Türkiye
seen from Yemen

seen from United States

seen from Türkiye
seen from Russia

seen from United States
seen from Italy
seen from United States

seen from Malaysia

seen from Türkiye

seen from United States
Hard 16
It looks like some pretty heavy hints have been added to the game, so I guess this blog is obsolete now. Alas
Solution: