Are you looking to get some great underwater shark pictures in your quest to be National Geographics next big photographer? Or maybe you just want a camera that you do not have to worry about around the boat, beach or pool. While you can get an additional add-on waterproof case for some existing camera, they can be expensive, bulky and awkward to both pack and use. Why not get a camera that's already waterproof without needing to spend extra money on accessories.
There are several models out there, but my favorite choice would have to be the Olympus Stylus 790SW waterproof, shock proof, dust proof, and freeze proof. The 790SW is the successor the 770SW, which is still available, but a little harder to find. The biggest difference between the two cameras, is that the older 770SW can go be used in up to 33 feet of water, whereas the newer 790SW can only be used in up to 10 feet of water. Olympus apparently decreed that the demographic for the 790SW were not big deep sea divers. Probably makes sense.
The other nice thing about the 790SW, is it's all around durability. This has got to be one of the toughest cameras out there. Dropping it from 5 feet or less has no affect on the sensitive internal workings. Why more cameras are not built this way I have no idea. Not only can you take you take pictures under the water, you can take it out in the snow with no worries as well. Temperatures as low as 14 degrees Fahrenheit, or -10 degrees Celsius Will not damage the camera. I'm more of a warm weather fan myself.
Friends of ours recently used their 790SW at one of those indoor water slide parks. They shot a video while hurtling through one of those big blue tubes from beginning to final submersion at the bottom. It's a pretty trippy clip as the light streams through the semi-translucent tube and the riders pitch to and fro. Definitely a fun camera. Some slight sacrifice in image quality are completely outweighed by the fun factor under these circumstances.