One of Iceland’s most popular tourist attractions is Blue Lagoon. The spa’s proximity to the Keflavík Airport makes this the perfect haven for relaxation before or after an international flight. Hop onto one of their easy transports so you can hop into their soothing geothermal pools with temperatures ranging from 98° to 104° Fahrenheit. Bláa Lónið also makes a perfect day trip from Reykjavík. It is less than 30 miles away. Advance reservations are highly recommended because droves of tourists want to experience why National Geographic lists Blue Lagoon among the 25 Wonders of the World.