What is it like to travel through Northern Europe on a cruise ship?

Cruise is the most suitable way to travel in Northern Europe. Most cruises arrive at the capitals of the four Nordic countries and Germany, Tallinn in Estonia and St. Petersburg in Russia. Consumer prices in Northern Europe are very high, and conventional tourism only The capitals of four countries, and the cruise ship also adds Germany and the three small Baltic countries, or one or two of them, are rich in content, flexible in time, comfortable in experience, and most importantly, extremely cost-effective.