20 of the best UK hotels and inns to rest and relax Gemma Bowes The Scarlet, north Cornwall Here’s a beachside hotel with a difference – a luxury eco-spa for adults. You can watch surfers battle the rollers from the comfort of hot water in a wooden barrel sauna and wooden hot tubs set high on the cliffs above the beach at Mawgan Porth, between Newquay and Padstow. The Scarlet is sustainably focused, using a biomass boiler, solar panels, clever heat capture and exchange technology to reduce its ecological impact. Outside, a natural reed-filtered cold-water swimming pool offers a sleek alternative to the waves beyond, and free yoga and tai chi classes and wellbeing talks are laid on. An ayurvedic spa offers unusual treatments such as a candlelit copper bathtub soak in Cornish seaweed, plus a relaxation lounge with dangling cocoon pod tents to chill out in afterwards. Good nosh is also part of the package. Expect delicate inventions such as poussin kiev and lemongrass prawn dim sum in the restaurant, or blackened pollack with crushed peas on the outdoor terraces, before the ever-present views of the sea.