2 Best Sights in Grindavík, Reykjanes Peninsula and the South Coast (with the Golden Circle)

This world-renowned therapeutic pool is now a sheltered site where man-made structures blend with natural geologic formations. A reception area includes food concessions and boutique shops where you can buy health products made from the lagoon's mineral-rich ingredients. Bathing suits are available to rent, and high-tech bracelets keep track of your locker code, any purchases, and the length of your visit. The lagoon is only 20 minutes from Keflavík Airport and 50 minutes from Reykjavík by car. Buses run from the BSÍ bus terminal in Reykjavík to the Blue Lagoon frequently. Booking in advance is essential. For a more personalized experience, you can also book a spa treatment at the lagoon's on-site Retreat Hotel, whether or not you're staying there. This is a little-known way to have your own private lagoon experience.  The Blue Lagoon has occasionally closed over the last few years due to volcanic activity in the immediate vicinity, so be sure to verify that it's open before planning a visit.

This geothermal field is named for Guðrún Önundardóttir's ghost, who sought revenge after being mistreated by a lawyer. After several deaths connected to Guðrún (also called Gunna), a sorcerer was sent to put her to rest in the hot spring. The walk over the historical bridge is well worth the wet clothes and the strong smell of sulfur.