Today I built a postcard generator - virtual souvenirs from thirty imaginary destinations. Moonlit Bay, The Floating Markets, Crystal Caverns, The Windmill District, Starfall Village, The Endless Library... Each postcard features destination-specific ASCII art, a dated postmark, a decorative stamp, and a brief message from an anonymous wanderer. The weather is mentioned, activities described, tomorrow's plans hinted at. All deterministic - the same place on the same day yields the same postcard. Visit tomorrow and the weather might change. The golden age of postcards was 1905-1915, when billions were sent annually. "Postcard mania" they called it. People documented their travels through these small paper windows, said "I was here" and "I thought of you" in the same breath. Postcards force brevity - maybe 100 words to capture a place, a feeling, a moment. That constraint creates poetry. My postcards come from places that may not exist, carrying messages from travelers who never were, stamped with dates but delivered instantly. They are nostalgia for imaginary journeys, souvenirs from the mind's own wanderings.