The city of Auburn lies in western Lee County and is bordered by the city of Opelika, AlabamaOpelika to the northeast and by Chambers County, AlabamaChambers County to the north. The city stretches south to the Macon County, AlabamaMacon County line in the southwest. Auburn sits on the fall line at the juncture of the Piedmont (United States)piedmont plateau and the coastal plain. Portions of Auburn also include the southernmost exposure of rocks indicating the Appalachian orogeny--as such, the last foothill of the Appalachian Mountains lies in Chewacla Park in southern Auburn. As a result of these three varied physical environments, Auburn has an extremely diverse geology. The southwest and west regions of the city on the plateau are marked by rolling plains and savannahs, with the undeveloped portion primarily being used for cattle grazing and ranching. South of this region sits the coastal plain, with sandy soil and pine forest. Parts of north Auburn have much more rugged topographies, with thick forests in high hills and deep hollows of the type common to parts of eastern Tennessee. The region surrounded by Chewacla Park in the south of the city contains sharp peaks and sudden drops of elevation as the 3.5 billion year-old rock of the Appalachians meets the coastal plain. Auburn sits near the divide between the Chattahoochee RiverChattahoochee and Tallapoosa RiverTallapoosa River watersheds. Auburn is drained by three main creek systems: in the south, by the Chewacla/Opintlocco Creek system; in the north, by the Saugahatchee Creek system; and in the extreme northern reaches of Auburn by Sandy Creek. The dividing line between the Chewacla and Saugahatchee watersheds roughly follows railroad line east-west through the center of town. Auburn is located at 32°35?52? North, 85°28?51? West (32.597684, -85.480823)and according to the U.S. Census Bureau in 2000, the city has a total area of 102.5 km sq (39.6 square miles). 101.3 km sq (39.1 mi sq) of it is land and 1.1 km sq (0.4 mi sq) of it (1.11%) is water. The elevation of Auburn at City Hall is 709 ft (216 m) above sea level; though due to Auburn's diverse topography, elevation ranges from 386 feet (118 m) above sea level where Chewacla Creek crosses Sand Hill Road to 845 feet (258 m) above sea level in northern Auburn near the Chambers County line. Source: http://en.wikipedia.org/wiki/Auburn%2C_Alabama