I struggled with this theme until I remembered a stamp I have shown before.
|Argentina and its Antarctic Territory|
When it came to the Arctic I was a bit miffed when I found Iceland is just below the Arctic Circle. Then I found that the island of Grimsey off its north-east coast lies partly in the Arctic. What's more there is a stamp showing the island.
|Iceland - Grimsey|
For other stamps associated with the polar regions please visit Viridian's Sunday-stamps-144.