Literally the height of luxury, Signiel Seoul opened in April 2017 in the 1,821-foot Lotte World Tower, one of the world’s tallest buildings. Sleek rooms feature murals of cherry blossoms on the walls and Diptyque bath amenitites, plus panoramic views over the Gangnam neighborhood and access to a gym, swimming pool, and exclusive guest lounge and library. The Evian Spa focuses on hydrotherapy and immersion water treatments, and an ice fountain turns the heat down after a visit to the wet or dry sauna. Once you’ve reached total relaxation, enjoy French haute cuisine and decadent desserts at Michelin-starred chef Yannick Alléno’s Stay restaurant or contemporary Korean at Bicena, then toast your good fortune at the largest champagne bar in Korea—all on the 81st floor.