Kauai has many stunning natural features, but the largest, and most spectacular is Waimea Canyon, otherwise known as the Grand Canyon of the Pacific. As the canyon is over fourteen miles long, and over 3,600 feet deep, it is definitely one of the geologic wonders of the world. The canyon was carved by the Waimea River, which has flowed down to the ocean from Mount Wai'ale'ale over thousands of years. (More information on the geologic history of Waimea Canyon is located here). In my opinion, visitors to Waimea Canyon, like the Grand Canyon should get out and explore the area on foot, but for those who either don't have the time, or the ability to do so, this overlook provides stunning views for everyone; and serves as a great panoramic vista even for people who plan on hiking.