claim: South Island is designated as the "mainland" by South Island denizens.
evidence: Gronvik , previously Sumpviken , is a village and part of the village of Iskmo in the municipality of Korsholm , western Finland .. Iskmo. Iskmo. Korsholm. Korsholm. western Finland. western Finland. The village lies on a stretch of coast , approximately 3 km long , stretching a few hundred metres up country , and around 500 metres along the Jungsundvagen road , with about a hundred metres of area around the road being inhabited .. Road 724 , Alskatvagen , passes through the village .. The third named road found in Gronvik is Langkarrvagen .. The companies Kent Haggdahl , TMI Antti Vaaranmaa , Hastbacka Invest , Easywash S-E Herrgard and Alandia Easy Wash are based in Gronvik .