Fancy Springs is one of top relaxing and touring spots that is mainly a spa and recreation center. It was only shown briefly in the episode Clams. This is one of Squidward's favorite places in the entire Pacific Ocean.
There has only been one very short glimpse of Fancy Springs, so that means not very features of the spa are known. So the only known features of Fancy Springs are: a full length heated pool, a wooden paneled hot tub, and a towel stand.