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Carrizo Plain National Monument

(Encyclopedia)Carrizo Plain National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Cascade-Siskiyou National Monument

(Encyclopedia)Cascade-Siskiyou National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Castle Clinton National Monument

(Encyclopedia)Castle Clinton National Monument: see Battery, the. ...

Castle Mountains National Monument

(Encyclopedia)Castle Mountains National Monument, 20,920 acres (8,466 hectares), SE California. Surrounded on three sides by the Mojave National Preserve (see Mojave Desert), the monument contains Native American a...

Poverty Point National Monument

(Encyclopedia)Poverty Point National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Pipe Spring National Monument

(Encyclopedia)Pipe Spring National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

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...

Pompeys Pillar National Monument

(Encyclopedia)Pompeys Pillar National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Vermilion Cliffs National Monument

(Encyclopedia)Vermilion Cliffs National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...

Pickering, William Henry

(Encyclopedia)Pickering, William Henry, 1858–1938, American astronomer, b. Boston, grad. Massachusetts Institute of Technology (B.S., 1879). He taught at the Massachusetts Institute of Technology (1880–87) and ...