Alibates Flint Quarries National Monument is a United States National Monument in the State of Texas. For thousands of years, people came to the red bluffs above the Canadian River for flint, vital to their existence. Demand for the high quality, rainbow-hued flint is reflected in the distribution of Alibates Flint through the Great Plains and beyond. Today this area is protected by the U.S. National Park Service and is the only National Monument in Texas. The monument can only be viewed by ranger-led guided tours. English national monument Irish national monument U.S. National Monument This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... State nickname: Lone Star State Other U.S. States Capital Austin Largest city Houston Governor Rick Perry (R) Official languages None. ... The Canadian River is the largest tributary of the Arkansas River. ... Pebble beach made up of flint nodules eroded out of the nearby chalk cliffs, Cape Arkona, Rügen Flint (or flintstone) is a hard, sedimentary cryptocrystalline silica rock with a glassy appearance. ... The Great Plains states. ... The National Park Service (NPS) is the United States Federal Government agency that deals with all National Parks, many National Monuments, and other conservation properties with various designations. ...