To add to my other comment, maybe the poolside one could be more of a water park shaped one/wave pool that could imitate a beach scene.
And have a hot tub nearby aswell. But the hot tub will melt regular soldiers if you go in the water however diving suits and water vehicles woukd be fine.
Where the pool you can drown but still survive in. Maybe add things like deep sea diving suits for underwater foot soilder units. And also stuff like a harbor to build subs, water mines, ships, etc.
Pool floaties could act like various islands aswell.
Just a fun idea :]