Porto Alegre's best boutique hotel is built off an exquisite 1937 mansion (housing the lobby, bar and restaurant) with a glass atrium connecting the 132-guest-room tower to the historic property. Muted gray rooms are modern, minimalist and comfortable, while the three themed suites feature huge mirrors, sink-in bathtubs and unique design (we dig Nuptials and NYC).
It's in the upscale and leafy Moinhos de Vento, across the street from an intriguing historic, Versailles-inspired water treatment plant and gardens.