Stumholmen
... that Stumholmen island is part of the Naval City of Karlskrona, which has been a UNESCO World Heritage Site since 1998?
... that <b id="mwC64"><a href="./Stumholmen" id="mwC68" rel="mw:WikiLink" title="Stumholmen">Stumholmen</a></b> island is part of the <a href="./Karlskrona_naval_base" id="mwC7A" rel="mw:WikiLink" title="Karlskrona naval base">Naval City of Karlskrona</a>, which has been a <a class="mw-redirect" href="./UNESCO_World_Heritage_Site" id="mwC7E" rel="mw:WikiLink" title="UNESCO World Heritage Site">UNESCO World Heritage Site</a> since 1998?