Hawaii has hundreds of beaches across 6 main islands. Top 10: 1) Lanikai Beach (Oahu) — turquoise water, twin islands offshore; 2) Waikiki Beach (Oahu) — iconic urban beach with Diamond Head backdrop; 3) Wailea Beach (Maui) — luxury resort beach; 4) Kaanapali Beach (Maui) — 3-mile crescent; 5) Hanalei Bay (Kauai) — perfect bay with mountains; 6) Poipu Beach (Kauai) — monk seals and snorkeling; 7) Hapuna Beach (Big Island) — white sand crescent; 8) Punalu'u Black Sand Beach (Big Island) — volcanic black sand with sea turtles; 9) Ko Olina Lagoons (Oahu) — calm man-made lagoons; 10) Makena (Big) Beach (Maui) — undeveloped, dramatic.