Launched by Iceland's first microbrewery, Bruggsmiðjan – Kaldi, this spa and its restaurant are focused on the benefits of beer. Key to the experience is a private 25-minute beer bath in a huge, handcrafted wooden tub. Poured fresh for each guest, the baths are rich in Vitamin B, antioxidants and alpha acids. There's also an outdoor hot-pot with spectacular fjord views.
Beer baths are said to be great for the skin and soothing for the soul, though the chilled (and very drinkable) beer on tap next to your bath can also help with the latter. Lastly, remember what your parents said: don't drink the bath water.