Saint Kitts and Nevis is about 1.2 times bigger than Mammoth Cave National Park.

Mammoth Cave National Park is approximately 219 km² (84 sq mi), while Saint Kitts and Nevis is approximately 261 sq km, making Saint Kitts and Nevis 19% larger than Mammoth Cave National Park.
Tip: This to-scale comparison of Mammoth Cave National Park vs. Saint Kitts and Nevis uses the Mercator projection, which distorts the size of regions near the poles.

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