CARLSBAD CAVERNS, N. MEX.—Beautifully decorated limestone caverns believed largest yet discovered. Established 1930; 15.56 square miles.
CRATER LAKE, OREG.—Astonishingly beautiful lake in crater of extinct volcano. Established 1902; 250.52 square miles.
GENERAL GRANT, CALIF.—Celebrated General Grant Tree and grove of Big Trees. Established 1890; 3.96 square miles.
GLACIER, MONT.—Unsurpassed alpine scenery; 200 lakes; 60 glaciers. Established 1910; 1,533.88 square miles.
GRAND CANYON, ARIZ.—World's greatest example of erosion. Established 1919; 1,009.08 square miles.
GRAND TETON, WYO.—Most spectacular portion of Teton Mountains. Established 1929; 150 square miles.
GREAT SMOKY MOUNTAINS, N. C.-TENN.—Massive mountain uplift covered with magnificent forests. Established for protection 1930; 617 square miles.
HAWAII: ISLANDS OF HAWAII AND MAUI.—Volcanic areas of great interest, including Kilauea, famous for frequent spectacular outbursts. Established 1916; 245 square miles.
HOT SPRINGS, ARK.—Forty-seven hot springs reserved by the Federal Government in 1832 to prevent exploitation of waters. Made national park in 1921; 1.58 square miles.
LASSEN VOLCANIC, CALIF.—Only recently active volcano in continental United States. Established 1916; 163.32 square miles.