In Seoul's cosmopolitan entertainment district, Itaewon Land is an old-school jjimjilbang, It looms high above the eateries of the busy main street, Itaewon-ro, up a steep flight of wooden stairs.

Q: In this hot weather, I have to shower a lot. What are North Koreans' bathing habits? (Lee Chang-min, Jongno-gu, Seoul) A: Each of the 19 districts in Pyongyang, the capital of North Korea, has one ...