"A nine-story, plant-filled sanctuary aimed at eco-minded travelers, this property weaves hundreds of plants and living walls into 181 rooms finished in natural materials like moss, slate, oak and wool, with in-room filtration systems, no single-use plastics and recycled clothing hangers. Guests can book hotel-linked Audi e-trons for local travel and enjoy natural Bamford toiletries; downstairs, chef Tom Sellers’ organic European restaurant Dovetale (he trained at Noma and Per Se) serves standout dishes such as Susan’s Leek Vinaigrette and Steamed Dover Sole “Veronique.” The sustainable-luxury concept underpins an earthy yet upscale Mayfair address, with rates from about $590." - Heidi Mitchell