In the solarium is this cool hot tub. I took this on the last night when everyone was in their rooms packing.
Even when the ship is completely booked, it's large enough to find quiet spots if you know where to look. The solarium with its cushy lounge chairs and the Vintages wine bar are my favorite spots.
For this shot, I used a 12mm wide-angle lens and mounted the camera on the ground with a Platypod https://platypod.com/). The Platypod is like a tripod for low perspectives. This is a long-exposure that would have been difficult to shoot any other way. With the Platypod it was a breeze.