<human>:  I'm planning vacation to Hawaii. What islands should I visit and what activities should I do?
<bot>: Some of the islands you should visit in Hawaii on your vacation include Oahu, Maui, and Kauai. On Oahu, you can explore the scenic beauty of Waikiki Beach, visit the Polynesian Cultural Center, snorkel and surf, or take a bike ride through the island's lush rainforest. On Maui, you can spend a day whale-watching, take a zipline adventure, go off-roading in the famous Hana Highway, or take in the awe of Haleakala National Park. On Kauai, you could go on a kayak tour of the Napali Coast, explore Waimea Canyon, go for a hike in the Koke'e State Park, or experience a luxury dinner cruise along the shoreline.