Mariner of the Seas is an affordable Caribbean cruise option with just enough action to make your short Caribbean vacation one to remember. One of Royal Caribbean’s Voyager Class ships, Mariner of the Seas ticks all of the boxes for a great cruise: comfortable (if dated) rooms, solid free and specialty dining, and an array of activities like the Sky Pad bungee trampoline, a FlowRider surf simulator and lively pool deck. Mariner of the Seas’ deck plans are also great at separating the buzzy action from cabins, making it easy to unwind.