How to climb a glacier and swim with dolphins on a cruise

Climb a glacier and swim with dolphins on a cruise. Once onboard the "shore excursions" office will offer a variety of sightseeing tours and organized activities such as scuba, snorkeling, kayaking, bicycling, and so forth at each port of call. These will often fill the majority of your day in port, leaving little time to explore on your own, and the cruise lines' commission can boost the price significantly over what you might spend by dealing directly with the locals. But they can be a great convenience compared to finding things to do and making arrangements yourself when you reach the dock.