Ask yourself what is at the top of your bucket list. Would you rather hike a glacier, or a rainforest? Seeing rare animals in their natural habitats is a huge part of the appeal of expedition cruising.
A trip to the Galapagos is a exciting for many animal lovers, since it is home to species not found anywhere else on Earth like marine iguanas and blue- and red-footed boobies. If you seek howler monkeys, pink dolphins, and toucans, head down to the Amazon. Expedition also head to colder, ice-bound regions that the typical ocean ship can't navigate, such as the Arctic and Antarctica. Cruises to these can offer the chance to see penguins, polar bears, and walruses.
Also consider if you really have the time to do the trip. Needless to say, these are not quick getaways; Antarctica itineraries are often 21 days long, while Galapagos trips are typically seven to 10 days, including some time on land.