A hallowed name amongst seasoned spa folk, Sequoia Spa at The Grove in Hertfordshire is an opulent outfit that's won just about every top accolade going. A short train ride from the hustle of London, it feels a million miles away; 300 acres of parkland is yours to explore, while a ramble in the Zen Garden or a game of volleyball on its urban beach are just a handful of exceptional outdoor draws. Inside, the spa is no less impressive. Find yourself in one of the network of treatment rooms and you're guaranteed an unforgettable spa experience thanks to the range of deluxe ESPA therapies to choose from including exotic ayurvedic and Balinese rituals. Best of all it excels at the finer details; expect plush velvet relaxation loungers, ambient walkways and pools and even an OFSTED registered nursery for a serene baby-free break.