Completely retrofitted in 2016, the 96-guest National Geographic Endeavour II now cruises the Galapagos Islands year-round as part of the Lindblad Expeditions National Geographic partnership. In addition to its cozy library and full gym, the ship sails with a variety of gear, including Zodiacs (including glass-bottom ones), wetsuits, and snorkeling equipment, which naturalists use to guide groups ashore to view local wildlife. After a full day of adventure, you'll return to the ship's lounge and bar, where the naturalists lead recaps during cocktail hour and mingle with passengers during dinner.