On June 2nd, 1992, a big forest fire broke out in Sveio. The fire started southeast of Hopsfjellet. In a strong wind the flames spread quickly northward. Houses on the other side of the highway were threatened, but escaped unscathed. The burned area, which is easily visible about a 5 minute's drive south from the tunnel at the triple- junction, was made into a nature reserve in 1998. The intention was to ensure that the re-establishment of plant- and animal life would take place without disturbance.
For almost three thousand years Tjernagelshaugen (the Tjernagel cairn) has lain as a landmark at the Bømlo fjord. The poet Torarin mentions the cairn in his account of Knut the Mighty, who in the year of 1028 sailed from Denmark to Nidaros: “And in front of the old cairn at Tjernagel sailed soldiers sharp with peace”.