Le Royal Monceau Raffles Paris

Steps from the Arc de Triomphe, this 149-room hotel reads like a collaboration between Baron Haussmann and a contemporary artist. Starck filled the interiors with Murano glass, neon installations, and a private cinema. The spa by Clarins sprawls beneath vaulted ceilings; the rooftop suite has a 360-degree Paris you won't find on Instagram. Art is everywhere, but never in the way.