Facebook post by University of Helsinki Julkaistu 08.11.2020 klo 11:38 University of Helsinki kirjoitti Facebookissa The casual diver might mistake a warship for a mat-washing platform, but the researcher can tell the story behind the lump of wood. The Porkkala peninsula in Southern Finland is a treasure trove for marine archaeologists. Getting up close to centuries-old shipwrecks in underwater museums | University of Helsinki l.facebook.com The casual diver might mistake a warship for a mat-washing platform, but the researcher can tell the story behind the lump of wood. The Porkkala peninsula is a treasure trove for marine archaeologists.