Things to do in Oahu Hawaii near one of the best beaches for snorkeling in Oahu, Hanauma Bay, with travel tips. For US beaches, activities like swimming and snorkeling with turtles and fish! Best Oahu beaches give you things to do with nearby hiking trails, food, and shopping. USA travel destinations for bucket list for world adventures when on a budget! So outside of Waikiki and Honolulu, put it on the itinerary! Add snorkeling gear to Hawaii packing list and what to wear in Hawaii.