MAMMOTH CAVE, KY.—Interesting caverns, including spectacular onyx cave formation. Established for protection 1936; 38.34 square miles.
MESA VERDE, COLO.—Most notable cliff dwellings in United States. Established 1906; 80.21 square miles.
MOUNT McKINLEY, ALASKA.—Highest mountain in North America. Established 1917; 3,030.46 square miles.
MOUNT RAINIER, WASH.—Largest accessible single-peak glacier system. Established 1899; 377.78 square miles.
PLATT, OKLA.—Sulphur and other springs. Established 1902; 1.33 square miles.
ROCKY MOUNTAIN, COLO.—Peaks from 11,000 to 14,255 feet in heart of Rockies. Established 1915; 405.33 square miles.
SEQUOIA, CALIF.—General Sherman, largest and perhaps oldest tree in the world; outstanding groves of Sequoia gigantea. Established 1890; 604 square miles.
SHENANDOAH, VA.—Outstanding scenic area in Virginia section of Blue Ridge. Established 1935; 275.81 square miles.
WIND CAVE, S. DAK.—Beautiful cavern of peculiar formations. No stalactites or stalagmites. Established 1903; 18.47 square miles.
YELLOWSTONE: WYO.-MONT.-IDAHO.—World's greatest geyser area, and an outstanding game sanctuary. Established 1872; 3,471.51 square miles.