(Encyclopedia) Carlsbad Caverns National Park, 46,766 acres (18,940 hectares), SE N.Mex., in the Guadalupe Mts.; designated a national park in 1930. These connecting limestone caves, with remarkable…
(Encyclopedia) Rainbow Bridge National Monument, 160 acres (65 hectares), S Utah; est. 1910. Rainbow Bridge, the largest natural bridge in the world, is a symmetrical, pink, sandstone arch, 309 ft (…
(Encyclopedia) Riding Mountain National Park, 1,148 sq mi (2,973 sq km), SW Man., Canada, W of Lake Manitoba; est. 1929. A wooded region with small glacial lakes, on the highest part of the Manitoba…
(Encyclopedia) Ozark National Scenic Riverways, 80,786 acres (32,707 hectares), along the Current and Jacks Fork rivers, SE Mo.; authorized 1964 as the first national scenic river; est. 1972. Many…