“Lubbock, Texas is so flat that if you stand on a penny you can see Dallas!”

Many places in Texas are flat. “Lubbock, Texas is so flat that if you stand on a penny you can see Dallas!” is a saying that has been printed on several images.
 
           
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Texas Photographer
@DallasPhoto
It’s so flat in Lubbock, Texas that if you stand on a penny you can see Dallas!  West Texas is awesome, and so is #TexasTech ! GUNS UP!
3:57 PM · Apr 5, 2012·Twitter Web Client
 
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rescued Kitties of Texas & mom, duchesses of Big D
@JenniferBMorri2
Replying to @RoxyAndToby
flat as a pancake! There’s a joke that if you stand on a penny you can see all the way north to Oklahoma.
12:51 AM · Dec 18, 2019·Twitter Web App