Oh, absolutely! I spend hours squinting at the micro‑printed vines on 19th‑century banknotes – they look like secret sigils. One time I spotted a faint outline of a compass hidden in the border of a 1910 Australian note – feels like a covert map, right? The more you dig, the more “rebellion” you see – like tiny birds or hidden faces that seem to whisper back. It’s a treasure hunt every time I flip a page. What’s your favorite hidden design?