Mineral-rich thermal waters have long been celebrated for their curative powers. Even if you don’t suffer from any ailments, you’re still sure to find the experience of soaking in a hot spring incredibly restorative and relaxing. Iceland is among the best destinations for hot springs, offering a mix of sprawling, developed complexes, such as the Blue Lagoon in Reykjavik to the Secret Lagoon in the Golden Circle area.

Hungary and the Czech Republic are also exceptional choices, particularly if you head to Budapest—home to gorgeous spas, such as the Széchenyi Thermal Baths or to Karlovy Vary, a Czech spa town with over a dozen spots to soak.