Antarctica, the Galapagos, the Mediterranean, the South Pacific and Alaska are popular destinations for round-trip cruises. Other highly-regarded destinations include the Caribbean, the fjords of Norway, the Hawaiian Islands and the Baltic Sea.
With vast glaciers, penguin colonies and oversized icebergs, Antarctica offers scenery unlike many other places. As of 2015, approximately 50 cruise ships sail to Antarctica. Ships that tour Antarctica generally have small passenger capacity, with three of the most luxurious being Silver Explorer, Le Boreal and National Geographic Explorer. The high cost for cruises to this area can be prohibitive. The ocean and weather are most agreeable from mid-December to late February, and cruise lines do not travel to Antarctica from April to October.
Travelers to the Galapagos islands can enjoy exploring the area where Charles Darwin viewed unusual wildlife to support his theory of evolution. While many cruise ships feature round-trip tours of this area, three of the most notable include the Celebrity Xpedition and National Geographic's "Endeavor" and "Island." The climate in the Galapagos is suitable for year-round travel, and wildlife viewing is always abundant. Given its close proximity to the equator, this area experiences two climate seasons: the wet season, which runs from January to March, and the rest of the year, which is typically very dry.