Mammoth Cave National Park is about 1.2 times smaller than Cayman Islands.

Cayman Islands is approximately 264 sq km, while Mammoth Cave National Park is approximately 219 km² (84 sq mi), making Mammoth Cave National Park 82.79% the size of Cayman Islands.
Tip: This to-scale comparison of Cayman Islands vs. Mammoth Cave National Park uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: Mammoth Cave National Park vs. Cayman Islands

Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.