A dazzling display of contemporary architecture, Hotel Arts Barcelona (operated by the Ritz-Carlton Hotel Company) is renowned the world over for its impeccable service and lavish accommodations, including 28 duplex penthouses. The latter are located on the top floors of the hotel and offer butler service and use of a MINI Cooper. The hotel has also opened an exclusive spa, 43 The Spa, located on the 43rd floor. And, of course, there's more: terraced gardens, an Infinity pool, and a Family pool; a stunning collection of Spanish art; and five restaurants, including the acclaimed two-Michelin-star Enoteca (with a wine cellar topping 700 labels).