Duty-free shops (or stores) are retail outlets that don't apply local or national taxes and duties. Duty-free shopping's a bit of misnomer though because shoppers may still have to pay duties in their home country on items purchased from a duty-free shop. They're often found in the international zone of international airports, sea ports or onboard passenger ships. They aren't as commonly available for road or train travelers, although several border crossings between the United States and Canad… (More on Duty-free)