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 almost 5,000 acres were listed for sale in Texas's Lee County recently, representing a combined around $40 million in Lee County farms, ranches, hunting land and other land for sale. Lee County ranks 139th out of 254 counties in the Lone Star State for the combined amount of land currently advertised for sale. There were six properties listed as sold in Lee County through the Lands of America Comparable Sales Program. This represented a total value of $1,520,502. Giddings had the most land for sale. Its economy is defined as agricultural, with 1,807 farms recorded in the county during the most recent U.S. Census. Farming activities in Lee County generate annual revenues of $2 million, the majority of which comes from livestock products. Lee County is the 230th largest county (634 square miles) in Texas. It's located in the Blacklands South Texas region of Texas.