Trippy, somewhat mind-blowing and undsettling, and very underrated 1968 film starring Burt Lancaster, adapted from a short story written by John Cheever. It's kind of engrossing in that frightening 60s way.

The premise of the film is that Lancaster decides to swim home by way of his rich friends' pools. Along the way he encounters at each pool an old friend who each reveals a little about his character. As he gets closer and closer to home, his experiences with the people he encounters cause inner turmoil and tension to mount, and he (and we) begins to realize his life is not quite what he thought it was. At the end, he is dramatically shocked out of his self-delusion.