Made with Nano Banana 2 Lite · CC0 · 2 Jul 2026

Image: Hand-drawn vintage underground tunnels map viewed

Generated from: Hand-drawn vintage underground tunnels map viewed flat from directly above, top-down orthographic, 1920s: a network of brick tunnel corridors under a city block drawn as double-line passages, an old mansion footprint outline in the upper left with a descending stair marker, a pump station room on the right, small chambers along the passages, one dead-end corridor at the bottom right ending in a marked door symbol, hatching for solid earth between tunnels. Aged sepia blueprint paper with dark ink linework, faint water stains, warm amber accents, dark noir vignette at edges. Absolutely no text, no letters, no labels, no numbers, no compass. Flat 2D plan, no perspective.