No trip to Taiwan would be complete without the ever-present Betel Nut Girls, the puddles of red chaw-spit on the sidewalk, and personally being offered a betel nut by my father-in-law. The whole thing is terrible for your teeth, and you can guarantee nobody will want to kiss you. Plus, the tree's shallow roots leads to major hill erosion and mudslides. Oops! Read all about the little chewy bastard here.