Hawaii
Quick answer: Haleakalā's Sliding Sands crosses a volcanic crater, while the Nā Pali Coast's Kalalau Trail follows dramatic sea cliffs. Kalalau permits are required and can…
Haleakalā's Sliding Sands crosses a volcanic crater, while the Nā Pali Coast's Kalalau Trail follows dramatic sea cliffs. Kalalau permits are required and can book months ahead, so reserve before planning flights.
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