I didn’t swim in the Blue Lagoon, but I swam in a geothermic wastewater spa (there’s a lot of them) in Akureyri. Not worth it. It smelled like rotten eggs. The only relief was when there was a slight breeze. <br>Also, the roads in winter are most definitely not heated. The parking lots are covered in ice to the point where I seriously don’t understand how everyone in Iceland doesn’t have an SUV.