WHO ARE THOSE GUYS?

It's Mono Monday and the theme is...Landmark.  To my mind, there's no greater Landmark in the U.S. than Mt. Rushmore National Memorial.
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It's located in the Black Hills of South Dakota. If you'd like to learn a bit more about this national monument, check the link:  https://www.nps.gov/moru/index.htm
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For those of you who are color addicts, check the Extra.
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Best in Large