It can be stressful to make a plan when time is limited. That's why I created this guide to make sure you can get the most out of your short stay. It is designed for around 24 hours but you can still get a lot done within 12 hours or stretch it out a bit. Feel free to mix and match the locations depending on your time of arrival.
NOTE: Due to the recent and current seismic activity in and around Grindavík and the Blue Lagoon, I didn't include them in the guide. But here you can check whether the roads around Grindavík are open.