Lindblad Expeditions/National Geographic celebrates its 50th year in Antarctica with cruises aboard the 148-passenger National Geographic Explorer, as well as the 102-passenger National Geographic Orion, both equipped with videography subs relaying real-time underwater views. Naturalists and National Geographic photographers accompany every sailing. Rates for the multiple 14- and 24-day sailings start at $12,970; expeditions.com.
Seabourn’s Antarctica sailings combine extreme luxury with both the White Continent and the Falklands on the 458-passenger, all-suite Seabourn Quest sailing from Valparaíso, Chile, to Buenos Aires. Rates for the three 2016 sailings start at $14,999; seabourn.com.
If Emperor penguins are on your watch list, Adventure Smith Explorations’ November 27 voyage to the Weddell Sea aboard the 116-passenger Ortelius is your cruise. The ship is equipped with a helicopter for excursions to the ice. Rates start at $11,550; adventuresmithexplorations.com.
Princess Cruises' long experience in the far northwest gives it an edge on access to areas with limited capacity, such as Glacier Bay; seven-night sails from Vancouver to Anchorage on 2,214-passenger ships showcase the Inside Passage. Rates start at $749; princess.com.
Silversea’s July 11 Nome-to-Seward 12-night expedition voyage aboard the 120-passenger Silver Discoverer explores Russia’s far east and remote ports few others ever visit. Rates start at $10,750; silversea.com.