The central region of Texas covers the state's three largest cities: Houston, Dallas-Fort Worth and San Antonio. The limestone terrain of Texas Hill Country lies in Central Texas, as do the state's three largest rivers, the Trinity, the Brazos and the Colorado. A total of 6,000 acres were listed for sale in Texas's Lee County recently, representing a total value of around $92 million in Lee County land for sale. Lee County ranks 163rd in the Lone Star State for the total number of acres of land currently advertised for sale. There were three properties listed as sold in Lee County through the Land Network Comparable Sales Program. This represented a total value of $2,499,000. Among cities in Lee County with land and rural real estate for sale, Lexington had the most land for sale. Agriculture and farming drives the Lee County economy, with 1,807 farms recorded in the county during the U.S. Census in 2012. Farming activities in Lee County generate annual revenues of $2 million, the majority of which comes from livestock products. Lee County is the 230th biggest county (634 square miles) in Texas. It's located in the Blacklands South Texas region of the state.