Lake Norman is about 1.7 times smaller than Mammoth Cave National Park.

Mammoth Cave National Park is approximately 219 km² (84 sq mi), while Lake Norman is approximately 128 km² (49 sq mi), making Lake Norman 58.45% the size of Mammoth Cave National Park.
Tip: This to-scale comparison of Mammoth Cave National Park vs. Lake Norman uses the Mercator projection, which distorts the size of regions near the poles.
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