Former railway bridge in line to Abrene / Pitalovo, old Latvian town, temporary occupied by Russia. 
Discussion
Borders have evolved significantly over time in various regions around the world.
Think of a 'country' like a pretend rulebook invented by grown-ups to tell everyone, including kids, how they should behave in a group. It's like a game where they make the rules, and they want everyone to play by those rules, **even if they might not always be in your best interest**. Latvia, Russia, Germany, USA… 🤢🤮