12 Historic European Spas and Bathhouses for a Wellness Getaway | Condé Nast Traveler

"Providing all-day amusement and relaxation in the form of a capacious milky—and mineral-rich— blue lagoon (about 100 degrees Fahrenheit), steam baths, and a swim-up bar serving both hard and soft drinks, this bathhouse is popular among visitors and locals alike. Located less than 300 miles from Reykjavík , Mývatn is a worthy stop and stayover on the Iceland trail, and the geothermal baths of Mývatn, a designated nature reserve, provides a deeply edifying respite from some of the country’s more active pursuits. Although you’re unlikely to be surprised by the stunning Northern Icelandic scenery at this point, the peaceful, pleasant surroundings with views for days doesn’t hurt." - Stacey Lastoe