There is no known meaning behind the name of Kauai. Native Hawaiian tradition indicates the name’s origin in the legend of Hawaiiloa the Polynesian navigator attributed with discovery of the Hawaiian Islands. The story relates how he named the island of Kauai after a favorite son; therefore a possible translation of Kauai is place around the neck, meaning how a father would carry a favorite child. Another possible translation is food season. Kauai was known for its distinct dialect of the Hawaiian language before it went extinct there. Whereas the standard language today is based on the dialect of Hawaii island, the Kauai dialect was known for pronouncing /k/ as /t/. (In fact, Kauai retained the old pan-Polynesian /t/, while Hawaii has innovated and changed it.) Therefore, the native name for Kauai was Tauai, and the major settlement of Kapaa would have been called Tapaa. Kauai's origins are volcanic. The highest peak on this mountainous island is Kawaikini at 5,243 feet (1,598 m). The second highest peak is Mount Waialeale near the center of the island, 5,148 feet (1,569 m) above sea level. One of the wettest spots on Earth, with an annual average rainfall of 460 inches (11,700 mm), is located on the east side of Mount Waialeale. The high annual rainfall has eroded deep valleys in the central mountains, carving out canyons with many scenic waterfalls. On the west side of the island, Waimea town is located at the mouth of the Waimea River, whose flow formed Waimea Canyon, one of the most scenic canyons in the world, and which is part of Waimea Canyon State Park. At 3,000 feet (914 m) deep, Waimea Canyon is often referred to as The Grand Canyon of the Pacific.