One of my all-time favourites: Alga Norte in Carlsbad CA. Gorgeous facility!
Another favourite: Henderson Multigenerational Centre, Henderson NV.
Healdsburg (CA) Swim Center. Attached to a high school.... that is my dream!
Finley Aquatic Center, Santa Rosa CA.
Pardee Aquatic Center, Solana Beach CA. All the years I've been coming here, and this was the first time I've swam here!
Kitsilano Beach Pool, Vancouver BC. Kits Pool is probably one of the world's top pools (no lie!), it's 137.5m (150 yards), right next to the ocean with the Vancouver skyline in the background.
Kona Aquatic Center, Kona HI. Of course I love this one because it means I'm in Hawaii! Plus, Hawaii state pools are free!
Deerfield Beach Pool, Fort Lauderdale FL. A super-friendly swim coach let us use one of their lanes, as we were just getting in when their practice was starting. Thank you!