Sun-dal Chung (Chung Sen Dal; Jung Sun Dal Restaurant)
Sun-dal Chung (Chung Sen Dal; Jung Sun Dal Restaurant), 6499 Little River Turnpike, Alexandria, VA, 703-642-1444, a bit west of the I-395 ramp, across from the Salvation Army (Metro Trip Planner - opens in new window) [Korean DC | Yelp]
Number one for atmosphere, and open 24 hours. A gem, if you can spot the sign. Look for Korean symbols, not the English name. Good food, great soups, limited menu, which is a good thing. The sort of place Korean truck drivers would go to, if we had them around here. My favorite is the pork soup - superb - plus the seafood pancake is first-rate as well, very juicy.