Few crulselines now offer transatlantic crossings, but there are a few in the spring and fall when cruise ships are repositioned. These days most ocean cruises offer a relaxed, enjoyable way to experience beautiful cities and islands along the coasts of the Adriatic, Aegean, Caribbean, Mediterranean and other smaller seas. These small ship cruises allow for enjoyment of the changing vistas of coasts and islands enriched by land excursions. Adventure cruises are ocean journeys to pristine and sometimes challenging environments, with a special focus on the natural surroundings.