Halsön, Korsnäs, an island in the Kvarken (Quark) archipelago in the Bothnian Sea
After the Euroway service was terminated in April 1994, Silja Festival was moved back to the Kvarken to operate from Vaasa to Umeå and Sundsvall.
The company was founded in 2001 by well known Rabbe Grönblom, just months after Silja Line had put their traffic on Kvarken / Merenkurkku to an end because of a decision in the EU to stop taxfree sales on travels between member states.
They are included in the newly established UNESCO world nature heritage site in the archipelago of Kvarken.