Sunbathing—throwing down a towel, propping up a beach umbrella, and idly sifting sand through your toes—remains one of the greatest pleasures of visiting Hawaii. Lanikai beach on Oahu ranks as one of the world’s best, inspiring devotion with its fine sand and turquoise water. Kaanapali Beach on Maui exudes an air of luxury and the promise of cocktails after a day in the sun. To relax on the Big Island, bring sunglasses and a book to Kaunaoa Beach, but be warned—dazzling waters may distract you from your reading. And when the beaches get too crowded head for Papohaku Beach Park on Molokai, where there’s room for everybody on three miles of soft sand.