Barcelona has long been famous for its art and architecture, with Salvador Dalí, Joan Miró, and Antoni Gaudí all leaving their marks. But this is the first year that the Catalan city has broken into the World’s Best Cities top 10 list. Though diversions like wandering the Gaudí-designed Parc Güell have a timeless appeal, it’s new hot spots like Tickets, from mad-scientist brothers Ferran and Albert Adrià, that are creating the worldwide buzz. Where to stay? At the new Mandarin Oriental, where the Hong Kong hotel group’s legendary service is paired with Spanish designer Patricia Urquiola’s 98 bright, cream-on-white rooms.