Saxhóll
If you want to explore a volcanic crater without hiking too far, Saxhóll is the place. The most interesting views are from the top, where you can take in the whole scene at the center of the crater. Getting up is easier than you would think; man-made steps lead visitors up to the crest, and you'll be up at the top before you know it. Make sure to spend time walking around the peak, but watch your step.