(Encyclopedia) Reelfoot Lake, 20 mi (32 km) long, NW Tenn., near the Mississippi River; designated a national natural landmark by the National Park Service. It was formed when a depression created by? (Encyclopedia) national parks and monuments. The National Park Service, a bureau of the U.S. Dept. of the Interior, was established in 1916 to oversee the administration of 40 national parks and? (Encyclopedia) Mather, Stephen Tyng, 1867?1930, American industrialist and environmentalist, b. San Francisco, grad. Univ. of California, Berkeley, 1887. He began working for the Pacific Coast Borax? (Encyclopedia) Greenbelt, city (1990 pop. 21,096), Prince Georges co., W central Md., a residential suburb of Washington, D.C.; chartered 1937. Greenbelt was planned and built by the federal? (Encyclopedia) Hot Springs National Park, 5,549 acres (2,247 hectares), W central Ark.; est. 1921; nearly surrounded by the city of Hot Springs. Visited by Spanish explorer Hernando De Soto in 1541,? (Encyclopedia) Oxon Hill, village (1990 pop. 35,794), Prince Georges co., central Md., a suburb S of Washington, D.C. Oxon Hill was dominated by large estates until the 1950s. National Harbor, a? (Encyclopedia) Flathead fl?th?d, river, c.240 mi (390 km) long, rising as the North Fork, in SE British Columbia, Canada, and flowing generally SE through NW Montana, to Coram, where it is joined by? (Encyclopedia) cemetery, name used by early Christians to designate a place for burying the dead. First applied in Christian burials in the Roman catacombs, the word cemetery came into general usage? (Encyclopedia) Kern, river, 155 mi (249 km) long, rising in the S Sierra Nevada Mts., E Calif., and flowing south, then southwest to a reservoir in the extreme southern part of the San Joaquin valley? (Encyclopedia) Abbey, Edward Paul, 1927?1989, American writer and environmentalist, b. Indiana, Pa., grad. Univ. of New Mexico (B.A. 1951, M.A. 1956). An ardent, sometimes abrasive advocate for the?