One of Iceland’s must-dos, the geothermal Blue Lagoon is famous for its ethereal milky-blue waters. Remaining at 102 degrees fahrenheit all year round, the waters are rich in silica and minerals. Soak in the lagoon, slather on a silica mud mask and enjoy the complimentary drink at the swim-up bar. Choose from the basic ‘Comfort’ package, the ‘Premium’ package or the ‘Luxury: