Discover the volcanic island of fire and ice from both above and below on theunderworld lava caving and atv quad adventure weve packed this tour with the greatest thrills of iceland all in a matter of 5 hours youll begin by feeling the roar of your atv as you freely explore the otherworldly icelandic wilderness on a 1 hour atv adventure from reykjavik throw down the throttle as you pass over rocky lava terrain tracks to the shores of hafravatn lake and accelerate the pace of your heart