First-person shooting with the masks of Liquid Image. Photographing and filming in HD while diving. “Show the world from your point of view”, show ’em what hella cool life you have, diving in the clear blue water on your caribbean vacation or just the swimming pool of your little sister. There are several masks available from something like €80 up to €350.
A GoPro would be a good option too, perhaps even better. Ah well, here’s some camera-vacation-fun:
And else you could try swimming with sharks and try to get your camera eaten, super fun!