Rivers, lakes, and quarries can all be great places to go diving. The type of equipment needed varies greatly depending on what type of course you are taking, and in what area of the country you are. The basic pieces of personal equipment that are needed include a mask, fins, and a snorkel. Though most equipment can be rented, it is best to purchase your own for the highest level of comfort, and the best fit. You have to be at least 12 years old to go diving.
None are more misunderstood than sharks.
Humans are not the natural prey of sharks. Almost all shark attacks happen by accident to swimmers and surfers. The shark mistakes them splashing on the surface for a seal or sea lion, and takes a bite. We taste pretty bad to them, so that's usually the end of it. And unless you're swimming with sea lions off the California coast or spearfishing in certain parts of Australia, you have virtually nothing to fear from the great white shark.