Grand Canyon National Park is about 2.1 times bigger than Australian Capital Territory.

Australian Capital Territory is approximately 2,358 km² (910 sq mi), while Grand Canyon National Park is approximately 4,863 km² (1,878 sq mi), making Grand Canyon National Park 106% larger than Australian Capital Territory.
Tip: This to-scale comparison of Australian Capital Territory vs. Grand Canyon National Park uses the Mercator projection, which distorts the size of regions near the poles.

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