Living up to its moniker Istancool, Turkey's capital has a trio of stylish new places to stay. Channel your inner sultan at Hôtel Les Ottomans (68 Muallim Naci Cad.; 90-212/359-1500; lesottomans.com; doubles from $1,641), where there's enough shimmering silk, Bohemian crystal, and Oriental rugs to rival the nearby Dolmabahçe Palace. l In the boho Ortaköy area, the Radisson SAS Bosphorus (46 Çiragan Cad.; 90-212/310-1500; radissonsas.com; doubles from $315) has 120 airy rooms enhanced with splashes of lime green or red, and photographic wallpaper panels. l The 82-room art-themed Sofa Hotel & Residences (123 Tesvikiye Cad.; 90-212/368-1818; thesofahotel.com; doubles from $410)—with cowhide rugs and black marble bathrooms—lures savvy urbanites to the happening Nisantasi district. And if you happen to overindulge at neighborhood eateries, relief awaits at the Taylife Spa, run by Turkey's foremost expert on slimming treatments.