Mandarin Oriental Bosphorus, Istanbul

What the classifiers highlight

With only 100 rooms and suites, Mandarin Oriental Bosphorus reads as a boutique hotel despite its private piers for boat trips and a waterfront pool over the strait. Forbes points to a nearly 38,000-square-foot spa with marble hammams mixing local and East Asian treatments, and Novikov Istanbul, which pairs Asian, Mediterranean and Italian cooking under one roof.