The tunnel is very easily accessed and is less than 30 minutes drive from Reykjavik. TheLavaTunnel is easily accessable in the winter time as well. Head east on road no. 1 and drive for about 18 km. Turn right onto road no. 39 (Þorlákshöfn) and drive for another 12 km. The parking lot is right by the road. The GPS coordinates are: N.63º 56.407 / W. 021º 23.742