Here's a remarkable map, on the wall in Prof. Seegenschmiedt's waiting room, at his clinic in Hamburg. Each pin shows a patient's home:

JohnG:

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There are pins in six continents!

I included closeup photos of Europe, North America, and Australia, but there are also pins in Africa, Asia and South America. I mention that, to be sure they aren't overlooked.

And there are even two pins in New Zealand, one for each island - what a journey that is!