The F905 is a gravel track in Iceland that winds through stunning lava fields and past the imposing Herðubreið Mountain before reaching the vast Askja Caldera. Only accessible in the summer months with a 4WD vehicle, this road trip offers the chance to swim in the warm geothermal lake of the Askja Víti crater and explore Dreki and Drekagil Canyon. With river crossings and ash tracks, it's an off-road adventure not to be missed for those seeking a unique Icelandic experience.