CNN — Viking has conquered the small to mid-sized cruise ship market. Courtesy Cruise Critic Best cruise overall, mid-size ship: Oceania Cruises' Riviera earned best overall cruise in the mid-size category. Courtesy Cruise Critic Best cruise overall, small ship: Silversea Cruises' Silver Galapagos ranked first in the small ship category. Courtesy Cruise Critic Best entertainment, small ship: Paul Gauguin Cruises …
