Author's note: a version of this article is published in the November 2010 issue of the Groove.
In case you needed an excuse to head to Cheonggyecheon, here's an excellent one. The 2nd annual Seoul Lantern Festival (서울 세계등축제) will host dozens of gorgeous lanterns lighting up Cheonggyecheon. Go for the opening ceremony on the 5th if you want, or head down anytime to appreciate the lights. Though the lanterns will be up day and night, head there in the evening to catch them looking their best.