The Centennial States capital is located in Denver, and the state has a land area of 104,100 square miles. Colorado's highest point is Mt. Elbert at 14,433 feet and its lowest point is the Arkansas River at 3,350 feet. Long known for its mineral resources and livestock ranching, Colorado by the 1990s had a diversified economy with substantial light-industrial development and a growing tourist industry based on its scenic and recreational attractions. The name of the state is taken from the Colorado R., which was named by Spanish explorers and means "reddish colored." Colorado is called the Centennial State. Colorado's mountains, large park areas, and numerous lakes and streams offer ideal conditions for outdoor recreation activities. Also popular are health spas at natural mineral springs. Colorado is the nation's leading ski-resort region, with more than two dozen major ski areas, including those in Aspen, Steamboat Springs, Telluride, and Vail.