There's only one drawback to Iceland's Blue Lagoon: As soon as you leave the milky blue water, which is naturally heated to 99–102°F by lava flowing underground, it's fairly frigid. However Blue Lagoon Resort's in-water bar eliminates that problem, serving smoothies, beer, wine, and cocktails from a structure built right into the pool. The best part: There's no cash or cards necessary; just scan the electronic bracelet you were given when you checked in (it also opens your locker). Don't plan on getting hammered here, though; there's a three-drink limit while you're in the lagoon.