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Theodore Roosevelt National Park

(Encyclopedia)Theodore Roosevelt National Park, 70,447 acres (28,531 hectares), W N.Dak., in the Badlands and on the Little Missouri River; est. 1947. There are three units—the North Unit, the Elkhorn Ranch Unit,...

Rainbow Bridge National Monument

(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 (94 m) high, 33 ft...

Richmond National Battlefield Park

(Encyclopedia)Richmond National Battlefield Park: see Richmond, Va.; National Parks and Monuments (table)national parks and monuments (table). ...

Riding Mountain National Park

(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 escarpment, it i...

Nicodemus National Historic Site

(Encyclopedia)Nicodemus National Historic Site: see National Parks and Monuments (table)national parks and monuments (table). ...

Papahānaumokuākea Marine National Monument

(Encyclopedia)Papahānaumokuākea Marine National Monument, 582,578 sq mi (1,508,870 sq km), in the Pacific Ocean surrounding the NW Hawaiian Islands, c.270 mi (435 km) NW of Oahu; est. 2006 as Northwestern Hawaiia...

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