Several years ago when I was a caretaker for a 13,000 sq. ft. ranch home out in the middle of nowhere, one of my jobs was to take care of the indoor swimming pool. As I had taken care of an outdoor pool several years before that, I discovered that maintaining indoor pools is much easier than outdoor ones. This is mainly because the sun breaks down the chemicals like chlorine and bromine much faster than normal. And if you don't stay on top of it, you can end up with problems overnight.
Generally with indoor pools, you don't see a lot of elaborate landscaping. Generally. However, it is possible and depending on taste, to landscape around a pool in an indoor setting to any extent as long as the plants you choose are matched with the amount of lighting. And even with that, indoor plant lights are a possibility. Indoor planters and pots can be placed and filled with real and artificial plants.