Time for #fridaygeotrivia, this toot start the thread.

Once again our question revolves around country chains. But this time we consider the attribute of GDP per capita.

What is the longest chain of countries such that each successive country in the chain shares a land border with and has a higher GDP per capita than the previous country?

Example: Portugal - Spain - France - Andorra

https://blog.opencagedata.com/post/geotrivia-october-2023