This restaurant near the harbour has really excellent food (and prices to match) but I think it's worth it. The menu is especially strong on seafood: try anything made with "nieria" or Arctic charr, which is a delicious relative of salmon and trout. Downstairs in the Krog is less posh.
G.W. Sundmands
Etelaranta (off Market Square), Helsinki
www.royalravintolat.com/sundmans/index_eng.asp
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