The reason a passport is mandatory for this American national park
In contrast to parks on the mainland, the National Park of American Samoa mandates that guests provide documentation of US citizenship or nationality. Situated below the equator within a US territory that maintains unique immigration policies, this isolated, no-cost park covers three separate islands. It features untouched rainforest environments, vibrant coral reefs, and prime conditions for viewing the stars without the interference of artificial light.
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