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. Land for sale in Texas's San Saba County recently totaled almost $235 million and nearly 100,000 acres. San Saba County ranks 146th out of 254 counties 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 San Saba County through the Land Network Comparable Sales Program. This represented a total value of $3,836,460. San Saba had the most land for sale. Agriculture and farming drives the San Saba County economy, with 744 farms recorded in the county during the U.S. Census in 2012. Farming activities in San Saba County generate annual revenues of $4 million, the majority of which comes from livestock products. San Saba County is Texas's 47th largest county (1,138 square miles). It's located in the Hill Country North Texas region of Texas.