Aurora

Among all the warm beaches, cards from the very north must feel lost.

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You can see the beautiful aurora (northern lights) over the glacial lagoon of Breiðamerkurjökull.

The stamp shows the lighthouse Kálfshamarsviti, which overlooks Húnaflói (Huna Bay). If you want to find it on google maps, search for "66°01'00.0"N 20°26'00.0"W". There's a cloud though.