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2/ First up you might have seen that Spain has been growing in recent years, due to volcanic eruptions in the Canary Islands

https://www.theguardian.com/world/2021/sep/30/canary-islands-lava-peninsula-in-the-atlantic-doubles-in-size

https://www.openstreetmap.org/#map=14/28.6159/-17.8975

3/ Staying in "Macronesia", Spain until recently has a dispute with Portugal over the Exclusive Economic Zone around the Savage Islands

https://en.wikipedia.org/wiki/Savage_Islands#Disputed_territory

@opencage fun fact, the Spain/Portugal border is the longest uninterrupted border within the European Union, and one of the oldest borders in the world, almost unchanged since 1297.

https://en.m.wikipedia.org/wiki/Portugal–Spain_border

@vpermar @opencage ...but the border itself is not clear, since Olivenza is (technically) contested territory.
https://en.wikipedia.org/wiki/Olivenza#Claims_of_sovereignty