Changseongok 창성옥

A decades-old Seoul-style haejang-guk (hangover soup) institution near Hyochang Park Station, located within the Yongmun Market area. The broth is built on beef neck bones, napa cabbage cores, and sonji (blood cake), seasoned with doenjang for a refined, clean flavor, a hallmark of Seoul-style preparation that stands apart from the spicy, gochugaru-heavy varieties found elsewhere. Frequently mentioned alongside Hanseong-ok and Yongmun Haejangguk as one of Yongsan's three legendary hangover soup spots, Changseongok has its own distinct character: a broth that deepens in flavor the longer it simmers in the pot. Each individual serving comes generously loaded with two tender bone pieces and bouncy sonji. For parties of two or more, the bone jeongol (hot pot) is the definitive order, paired with individual bowls of rice and fried eggs at just 500 won each, it elevates the experience to another level. The restaurant operates from early morning through the evening, making it accessible for both breakfast haejang and dinner. The narrow market road limits front-of-house parking to roughly two vehicles; parking elsewhere and walking in is the practical approach.