Tui Musement allows customers to discover ports of call “at their own pace”, the line said, after it finalised the agreement.
Guests can purchase tickets for thousands of attractions, including the Chocolate Museum in Cologne or a pass to visit the top archaeological sites in Athens, plus do activities such as hiring a bike in Amsterdam.
Stephanie Farrow, itinerary product and destination experience manager at Fred Olsen Cruise Lines, said: “While many of our guests love going on our organised shore tours, there are several who prefer the opportunity to head ashore and explore independently.