Surtshellir
... that Surtshellir, named for the fire giant Surtr, is the longest lava cave in Iceland?
... that <b id="mwC0c"><a href="./Surtshellir" id="mwC0g" rel="mw:WikiLink" title="Surtshellir">Surtshellir</a></b>, named for the <a class="mw-redirect" href="./Fire_giant" id="mwC0k" rel="mw:WikiLink" title="Fire giant">fire giant</a> <a href="./Surtr" id="mwC0o" rel="mw:WikiLink" title="Surtr">Surtr</a>, is the longest <a href="./Lava_cave" id="mwC0s" rel="mw:WikiLink" title="Lava cave">lava cave</a> in <a href="./Iceland" id="mwC0w" rel="mw:WikiLink" title="Iceland">Iceland</a>?