By its most basic definition, cliff diving is exactly what you would expect it to be based on the name. It is an extreme sport that involves highly-trained athletes diving into the water from a very high, rocky cliff. This give it a smilier allure as other extreme sports, including base jumping and rock climbing. Which is why this activity should only be attempted by people who have been given the proper training and have gained the necessary experience that allows them to take part in the sport without injuring themselves. All others are cautioned to remain spectators, as it can take years to acquire the necessary skills to compete safely.