One of my favourite subjects is pre-Columbian contact between the Americas and the rest of the world (do feel free to ask this colonial history geek about that).
This 1st Century Roman mosaic from Pompeii caused me quite a lot of mental anguish until @CottonCandyandRazorblades pointed out the damn "pineapple" (Ananas comosus) is actually a celeriac (Apium graveolens).
π 1/2
