Potato Avenue is a chain of fast-food stands throughout Korea. They serve one thing – sweet potatoes coated with a sweet glaze. 2,000 wŏn for a cardboard cone full of them, or larger 4,000 and 10,000 wŏn containers. Highly addictive. They have competitors, at least in Seoul, but others are less tasty. One is near Jongno-sam-ga in Seoul.