Biltmore Estate is around the same size as Mackinac Island.

Mackinac Island is approximately 9.54 km² (3.68 sq mi), while Biltmore Estate is approximately 9.27 km² (3.58 sq mi), making Biltmore Estate 97.16% the size of Mackinac Island.
Tip: This to-scale comparison of Mackinac Island vs. Biltmore Estate uses the Mercator projection, which distorts the size of regions near the poles.
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