Seodaemun Museum of Natural History (서대문자연사박물관)

Gyeongbokgung closes on Tuesdays and Changdeokgung closes on Mondays, so one of them is always open. Here is the day laid out with times, walking legs, ticket prices and a realistic total, plus the swap that saves the plan when you turn up on the wrong day.

Korean home rentals sat in a grey area for a decade. Then Airbnb made every host in the country upload a licence, and blocked bookings for the ones who didn't. Here is what the licence categories actually permit — including the one that forbids Korean guests by law.

Seoul's PM2.5 average has fallen about 40% since 2006. The confusing part is that Korea and the United States draw the line between 'good' and 'moderate' in different places, so the same air reads differently depending on which app you open.