The Osuva Outfitters warehouse is located under Observatory Hill (Tähtitorninvuori), a five minute walk from Stockmanns -department store. Visits by prior appointment only! The address is Fabianinatu 1, where you'll find a ramp leading into the hill with a EuroPark sign above it. Head down the ramp and through the door in the gate. You'll come to spiral staircase. Climb the stairs and follow the passage and you'll come to the store.