Everyone knows everything there is to know about our world-famous Mount Rushmore National Monument and who built it, who is on it, and why it was built, but did you know that this iconic landmark is also home to a secret tunnel? Whether you did or did not, read on as we check out this super secret spot that was recently called one of the greatest places in America:

You can see even more pictures of the secret tunnel by watching Article-TUBE2‘s interesting slideshow on Youtube! Discover even more Mount Rushmore history by clicking 16 Rare Photos Taken During Mount Rushmore Construction That Will Simply Astound You.

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