You don't have to leave Seoul: many red and golden foliage spots are reachable by subway, usually best in late October to early November.
- Changdeokgung Palace and Huwon (Secret Garden): the city's most beautiful autumn garden; Huwon is by guided tour only, so book early.
- Gyeongbokgung Palace: free entry if you wear hanbok, great photos with golden leaves.
- Deoksugung Stonewall Road: a ginkgo-lined street in the centre, free.
- Haneul Park: silver-grass hills, best at sunset.
- Namsan and N Seoul Tower: walk the slopes for foliage and city views.
Note: palaces are packed at weekends; go early on a weekday for photos without crowds.