About blumis...
I like very much single view postcards with photos of interesting buildings new and old. Overall view of amazing bridge in the night, tall skyscraper, old factory or detail like ancient door handle.
Postcards connected in some way with most northern or most southern regions of the world (like Arctic, Antarctica, Alaska, Tierra del Fuego, northern Europe).
Exploration of wilderness, scientific expeditions, caves, big mountains, vast amount of snow and ice.
Big cities and small villages at the end of the world.
And, of course, everything about railways, trains and stations, lighthouses, spaceships.
If you have no idea what to write, you may write proverb in your language (with translation) or beginning of famous poem.