Countries with Longest Walkable Distance in a Straight Line
Name the Top 15 Countries with the Longest Walkable Distance in one, single Straight Line, assuming that you can pass through inland rivers and lakes. You are not allowed to pass through seas or oceans and not allowed to pass the border through another country.
Google Maps, the feature where you can measure the distance between 2 points, I did the measurements myself and I'm pretty sure I got almost all of them very accurate but if not there is maximum like a 5-10 km error at most.