Kauas origins are volcanic, the island having been formed at approximately six million years ago, is the oldest of the main islands. One of the wettest spots on earth, with an annual average rainfall of 460 inches, is located on the east side of Mount WaiÊ»aleÊ»ale. The high annual rainfall has eroded deep valleys in the central mountains, carving out canyons with many scenic waterfalls. Outside of the port, there were lots of buses to take hundreds of people off to their adventures for the day. The tug boat helped guide the Pride of America into port.