Cruise ships have come a long way in the last decade as lines push the boundaries when it comes to size, capacity and thrilling amenities to appeal to a new generation of holidaymakers.

These days, passengers can spend time at sea in a lounge where they are served by robotic bartenders, in a spa where artificial snowflakes fall inside a snow room, or in a planetarium where they are taken on a virtual tour of outer space, and still fail to take advantage of everything on board.

From a cycling track suspended above the upper deck to a bar made of ice, these are some of the best amenities on cruise ships.