Top 5 Things to Do on Oahu You Won’t Forget If you’re planning a trip to Oahu, it’s easy to feel overwhelmed by how much there is to do. Beaches, hikes, tours, food spots… it adds up fast. But here’s the truth: you don’t need to do everything to have an amazing trip. Some experiences stay with you long after you leave the island. They aren’t rushed. They don’t feel like a checklist. Here are my top picks for things to do on Oahu: 1. Walking through Waimea Valley and swimming under the waterfall