India, June 20 -- There are selfies. There are great selfies. And then there are cruise selfies - where the backdrop changes every few hours, the light behaves differently than it does on land, and the setting is so good your friends assume you hired a photographer.

Norwegian Luna, one of Norwegian Cruise Line's newest ships at sea, is proof that some vacations are built differently. The backdrop is constantly shifting. Sunrise over open water looks nothing like noon, noon nothing like golden hour, and golden hour nothing like a night on a glowing deck. You'll never capture the same moment twice.

Here are 12 spots on board worth every frame in your camera roll.

Some ships are forgettable on the outside. This one isn't. Norwegian Luna's...