Manoa Falls Trail: Waterfalls in Oahu with one of best waterfall hikes in Hawaii. For US hiking trails in Hawaii, tons of hikes on Hawaii vacation on the island, a few Oahu waterfall hikes too. Manoa Falls is near Honolulu and Waikiki, and some people go swimming. For a day away from beaches, snorkeling, shopping, food. Outdoor travel destinations, activities, ideas for bucket list for budget adventures! Think about what to wear, what to pack for hiking to add to Hawaii packing list!