Mill Valley, city (1990 pop. 13,038), Marin co., W Calif., a suburb on Richardson Bay, an inlet of San Francisco Bay; inc. 1900. It is a residential community set in heavily timbered hills and...

National Parks and Monuments1BFBattlefieldBPBattlefield ParkBSBattlefield SiteHPHistorical ParkHSHistoric SiteHTHistoric TrailISInternational Historic SiteLSLakeshoreMMMemorialMOMonumentMPMili...

Valley Forge, on the Schuylkill River, SE Pa., NW of Philadelphia. There, during the American Revolution, the main camp of the Continental Army was established (Dec., 1777–June, 1778) under th...

Death Valley, SE Calif. and SW Nev., a deep, arid basin, 140 mi (225 km) long, bordered on the W by the Panamint Range and on the E by the Amargosa Range. In summer the valley has recorded som...

Long Valley, caldera, c.10 by 20 mi (15 by 30 km), Mono co., E Calif., at the eastern edge of the Sierra Nevada. Formed by a catastrophic eruption c.730,000 years ago, Long Valley and nearby a...

Kobuk Valley National Park, 1,750,737 acres (709,048 hectares), NW Alaska. Located in rugged terrain N of the Arctic Circle, the park embraces the central valley of the Kobuk River, a centurie...

Squier, Ephraim George, 1821–88, American archaeologist and journalist, b. Bethlehem, Albany co., N.Y. He is noted for his study of the prehistoric Mound Builders of the Mississippi and Ohio v...

Tamalpais, Mount, peak, 2,604 ft (794 m) high, W Calif., across the Golden Gate from San Francisco. The mountain is a game preserve and a resort. The city of Mill Valley and Muir Woods Nationa...

Verde, river, c.190 mi (310 km) long, rising in central Ariz. and flowing S to the Salt River. The valley supported early Native American civilizations and is dotted with ruins, such as those ...

Pachacamac, ruins of a walled Native American settlement, Peru, about 25 mi (40 km) SE of Lima in the Lurin Valley. This site, which contains a number of pyramids, was considered one of the mo...