The Blue Lagoon is a geothermal spa near Keflavik airport, so it is easy to fit into arrival or departure days; tickets sell out, so book a timed entry ahead of time. Bring a swimsuit, waterproof sandals, and a hair tie because the silica-rich water can damage your hair, and shower thoroughly without your suit as required.

Lockers are available for valuables, treatments and the on-site restaurant need separate reservations, and the least crowded windows are early morning or late evening.

Visits start at about $100usd and there are various packages you can upgrade too that include drinks and robes!