On the heels of its new pixelated banknotes, Norway has now overhauled the look of its passport with a minimalist redesign that has a surprise feature on the inside.When the passport is held under a UV light, a scene of the Norwegian landscape turns from day to night, revealing swirls meant to evoke the spectacular northern lights, and hidden text appears.

Source: Norway’s Sleek New Passports Contain a Surprise Design Feature | Slate