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 combined 100,000 acres were listed for sale in Hays County, Texas, recently; the overall value of all Hays County land for sale was $1 billion. Hays County ranks 40th 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 Hays County through the Land Network Comparable Sales Program. This represented a total value of $1,720,000. Among cities in Hays County with farms, ranches, and rural real estate for sale, Wimberley had the most land for sale. Hays County is the 225th biggest county (679 square miles) in Texas. It's located in the Blacklands South Texas region of Texas.