Oahu: Pearl Harbor, Diamond Head, Hanauma Bay, Makapu‘u Point, north shore
Maui: Haleakala National Park, the road to Hana, Kahekili Highway scenic drive, Molokini Crater
Kauai: Waimea Canyon, Kalalau Trail, Na Pali coast, Hanalei Bay
Big Island: Kona coast beaches, Waipi’o Valley, Volcanoes National Park, sunset at Mauna Kea
Molokai: Kalaupapa National Historical Park, Halawa Valley, Molokai’s cloud forest
Further reading: Top Things to Do in Hawaii.