A passerby on the morning of Jan. 9 walks along a frozen artificial waterfall at Hongjecheon Stream in Seoul's Seodaemun-gu District after the city issued its first cold wave warning of the season.
In Derbyshire stunning icicles formed at Kinder Downfall, where the icy weather caused the 98ft (30m) waterfall to completely freeze over. Photographer Rod Kirkpatrick was there early on Sunday ...