Situated in a 1950s landmark building in the heart of London's West End, Sanderson hotel's Agua Spa places an emphasis on the whimsical. You'll be transported by the billowing white curtains delineating each treatment room. Sink into the agua Milk and Honey Aryurvedic massage or go out on a limb with an Indian head massage. Whether you're looking for a traditional sea-salt exfoliation or a lymphatic drainage facial, you'll feel rejuvenated in this minimalist, open-plan spa.