Hidden gems: America's 20 least-visited National Monuments
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3. Alibates Flint Quarries, Texas( National Park Service )
In ancient times and even as recently as the mid-1800s people used flint from the Alibates Flint Quarry in the Texas panhandle to make tools for daily living. There are more than 700 quarries in the national monument, 35 miles north of Amarillo, Texas, where the flint was dug out by hand as many as 10,000 years ago. To see the quarries today, visitors must arrange for a mile-long ranger-guided tour offered by reservation only. Alibates Flint Quarries is also home to a host of Texas wildlife including wild turkeys, deer, antelope, roadrunners and coyotes. Rangers say it has some of the best sunrises and sunsets in the Texas panhandle.
Visitors in 2009: 2,981
More info: http://www.nps.gov/alfl